Gordon Keeble GK 1 (1964-66)
The **Gordon Keeble GK1** was the **first and only production car** from the Gordon Keeble company, making it **hugely significant** to the brand's short-lived existence. It was an ambitious attempt to create a **high-performance British grand tourer**, blending **Italian design, American power, and British craftsmanship**.
Despite its **critical acclaim** and impressive **Chevrolet V8 engine**, the company faced **financial struggles** and **supplier issues**, leading to its **liquidation in 1965** after producing just **99 cars**. The GK1 remains a **cult classic**, admired for its **fiberglass body, sleek Bertone styling, and unique tortoise emblem**, which became an ironic symbol of the brand.
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Popularity
The **Gordon-Keeble GK1 (1964–1966)** was *not* globally popular in the mass-market sense, but it earned a **cult following among enthusiasts and collectors**—particularly in the UK, U.S., and parts of Europe.
🌍 Global Reach vs. Limited Production
- **Production Total:** Just **99 cars** were built (plus one assembled from spare parts in 1970).
- **Export Markets:**
- **United Kingdom:** Home market with the strongest presence
- **United States:** Several cars exported via specialist dealers
- **Europe:** A few cars delivered to Germany and the Netherlands
- **Survivorship:** Over **80 of the 99** are still known to exist, with many in running condition—a remarkably high rate.
✨ Why It Wasn’t Mass-Market Popular
- **High Price:** At ~£2,798 in 1964, it was priced near Aston Martin and Rolls-Royce territory.
- **Low Production Capacity:** The Eastleigh factory could only produce a few cars per week.
- **Supply Chain Issues:** Strikes and parts shortages crippled production.
- **Niche Appeal:** A blend of British engineering, American V8 power, and Italian styling made it unique—but also hard to categorize.
🧠 Legacy
Despite its short life, the GK1 is now considered a **hidden gem of 1960s GT design**, with styling by a young **Giorgetto Giugiaro** and performance that rivalled Ferraris and Aston Martins of the era. It’s especially prized by collectors who appreciate its rarity and transatlantic pedigree.
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Overview: The **Gordon Keeble GK1 (1964-66)** was a bold attempt to create a **high-performance British grand tourer**, blending **Italian styling, American V8 power, and British engineering**. It was significant for the company in several ways:
- **First and Only Production Model** – The GK1 was the **only car Gordon Keeble ever produced**, making it the company’s defining project.
- **Italian Design Influence** – Styled by **Giorgetto Giugiaro** at **Bertone**, it had sleek, elegant lines that rivaled contemporary European GT cars.
- **American Muscle Power** – Powered by a **5.4L Chevrolet V8**, it delivered **300 HP**, making it one of the fastest British cars of its time.
- **Fiberglass Innovation** – The GK1 featured a **fiberglass body**, reducing weight and improving performance.
- **Limited Production** – Despite strong initial demand, only **99 cars** were built before the company folded in **1966** due to financial struggles.
- **Cult Classic Status** – Today, the GK1 is a **highly sought-after collector’s car**, with most of the original cars still in existence Review | Honest John](https://classics.honestjohn.co.uk/reviews/gordon-keeble/gk1/).
The GK1 was a car that had all the ingredients for success—**style, speed, and exclusivity**—but financial difficulties meant Gordon Keeble never became a lasting automotive brand.
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COMMON FAULTS
Please Note: Common Faults in Regularly Used Vehicles vs. Low-Mileage Stored Vehicles that have been used consistently over many years, accumulating approximately 10,000–12,000 miles annually, are more prone to common faults due to regular wear and tear. These issues typically arise from the natural aging of components subjected to frequent use, such as engine parts, suspension systems, brakes, and tires. In contrast, vehicles with low mileage that have been stored or preserved are likely to experience different types of issues. These vehicles are often better maintained to ensure their longevity and may avoid some of the typical wear-and-tear problems seen in regularly driven cars. However, they can still face unique challenges such as degradation of rubber seals, corrosion from prolonged inactivity, or fuel system issues caused by old or stagnant fuel.
The Gordon Keeble GK1, while a beautifully designed and powerful classic car, does have some common faults that owners and enthusiasts should be aware of:
1. **Electrical Issues**: The GK1 is known for having electrical problems, particularly with the wiring and connections.
2. **Cooling System**: The car's cooling system can be inadequate, leading to overheating, especially in warmer climates. 3. **Fibreglass Body**: Although the fibreglass body is resistant to rust, it can suffer from cracking and damage, particularly if the car has been involved in an accident.
4. **Parts Availability**: Given the limited production run, finding replacement parts can be challenging and expensive.
5. **Suspension and Steering**: The De Dion rear suspension, while advanced for its time, can be complex to maintain and repair. Despite these issues, the GK1 remains a cherished classic due to its unique blend of British, Italian, and American engineering.
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Body Style
The Gordon Keeble GK1 was primarily produced in a **2-door coupé** body style. This design was crafted by the renowned Italian designer Giorgetto Giugiaro at Bertone, giving the car its distinctive and elegant appearance..
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Trim Levels
The Gordon-Keeble GK1, produced between 1964 and 1966, did not have distinct trim levels like many modern cars. However, it was originally trimmed in vinyl, which was quite unusual for a luxury GT at the time. Many owners have since upgraded to leather interiors. The GK1 was known for its combination of British, Italian, and American engineering, featuring a fiberglass body and a powerful Chevrolet V8 engine. It was a unique and stylish car, but due to production issues, only 99 units were made.
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Designer/Dimensions
The **Gordon-Keeble GK1 (1964–1966)** was designed by a young **Giorgetto Giugiaro**, then working for **Bertone**. At just 21 years old, Giugiaro crafted the car’s elegant yet muscular lines, blending Italian flair with British-American engineering—a design that still turns heads today.
📏 Dimensions of the Gordon-Keeble GK1
- **Length:** 4,813 mm (189.5 in)
- **Width:** 1,727 mm (68.0 in)
- **Height:** 1,394 mm (54.9 in)
- **Wheelbase:** 2,591 mm (102.0 in)
- **Front/Rear Track:** 1,394 mm (54.9 in)
- **Kerb Weight:** ~1,436 kg (3,166 lbs)
The GK1’s proportions were classic GT: long bonnet, short rear deck, and a low-slung stance. Its glassfibre body kept weight down, while the wide track and low height gave it a planted, purposeful look.
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Where Manufactured
The **Gordon-Keeble GK1** was manufactured at **Eastleigh Aerodrome**, now known as **Southampton Airport**, in **Hampshire, England**.
Production took place in a historic building that had previously been used to prepare the **Supermarine Spitfire** for its maiden flight in 1936—a fitting birthplace for a car that blended British engineering, Italian design, and American muscle. Later, after the original company went into liquidation in 1965, a small number of additional cars were completed at a facility in **Sholing**, a suburb of Southampton.
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Production Total: 99
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Price New: The **Gordon Keeble GK1 (1964-66)** was priced at **£2,798** when new in the UK. This was **significantly lower** than an Aston Martin or Ferrari at the time, making it a **high-performance bargain**. However, financial difficulties meant that only **99 units** were ever produced.
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Sales: The **Gordon Keeble GK1 (1964-66)** was critically acclaimed but **not a commercial success**. Despite its **Italian styling by Bertone**, **American V8 power**, and **British engineering**, financial difficulties meant that only **99 units** were ever produced - The Classic Motor Hub](https://classicmotorhub.com/gordon-keeble-gk1-1965/).
The company struggled with **funding and production costs**, leading to its closure in **1966**. However, the GK1 has since become a **cult classic**, highly valued by collectors for its **performance and exclusivity**.
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Highest Sales Figures by Country
The **Gordon-Keeble GK1 (1964–1966)** had such a limited production run—just **99 cars built**, plus one assembled from spares—that detailed sales figures by country were never formally published. However, based on export records, club registries, and known surviving examples, we can sketch a likely distribution:
🌍 **Estimated Highest Sales by Country**
- **United Kingdom**
As the home market, the UK accounted for the **majority of sales**. Most cars were sold directly from the Eastleigh factory or through British dealers. Today, the **Gordon-Keeble Owners’ Club** is UK-based and supports a large number of surviving cars.
- **United States**
Several cars were exported to the U.S., where the **Chevrolet V8** and Giugiaro styling appealed to enthusiasts. A few were sold through specialist importers, though the brand remained niche.
- **Germany & Netherlands**
A small number of cars were delivered to continental Europe, particularly Germany and the Netherlands, often through boutique dealers or private orders.
- **Other Markets**
A handful of cars may have reached **Switzerland, Australia, and South Africa**, but these were likely private exports or later relocations.
🧠 Collector Insight
- Of the 100 cars built, **over 80 are still known to exist**, with many in the UK and a few in the U.S. and Europe.
- The **high survival rate** is a testament to the car’s build quality and the dedication of its owners.
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Historical Pricing Comparisons
The **Gordon-Keeble GK1 (1964–1966)** has followed a fascinating pricing arc—from boutique obscurity to a rising star in the collector GT market. Here's how its value has evolved over time:
💷 **Original Price (1964–66)**
- **Launch Price:** ~£2,798
- **Final Production Price:** ~£4,058
- *Context:* Comparable to an Aston Martin DB5 or Facel Vega II—ambitious pricing for a new, unproven marque.
📉 **Market Decline (1970s–1990s)**
- **Typical Value:** £5,000–£15,000
- *Insight:* Limited brand recognition and parts scarcity kept values modest. Many cars were underappreciated sleepers.
📈 **Collector Resurgence (2000s–2020s)**
- **2000s:** Renewed interest in rare Anglo-Italian GTs sparked a slow climb.
- **2010s:** Well-preserved examples began fetching **£30,000–£50,000**.
- **2020s (since 2020):**
- **Lowest Sale:** £23,155
- **Median Price:** £51,700
- **Highest Sale:** £85,000
- **Sell-Through Rate:** 100% (every car offered has sold)
🏆 **Condition-Based Values (2025, Hagerty UK)**
- **Fair (#4):** £39,200
- **Good (#3):** £56,300
- **Excellent (#2):** £78,000
- **Concours (#1):** £123,000
🧠 Market Summary
- **Survivorship:** Over 80 of 100 cars still exist—remarkably high.
- **Rarity + Giugiaro pedigree** are driving values upward.
- **Investment Grade:** B+ (strong niche appeal, but limited liquidity)
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Most Favoured Colour
The **most favoured colour** for the **Gordon-Keeble GK1 (1964–1966)** appears to be **metallic burgundy**, often paired with a **cream or light tan interior**. This combination is frequently cited in concours-level restorations and high-profile sales, including the renowned chassis #93 once owned by Victor Gauntlett and later restored by marque expert Ernie Knott.
🎨 Other Popular Period Colours
- **Black** – Classic and formal, often paired with red or tan interiors
- **Silver Grey** – Understated and elegant, highlighting Giugiaro’s crisp lines
- **British Racing Green** – Rare but period-correct, appealing to traditionalists
- **Blue (various shades)** – Several cars were finished in navy or metallic blue, sometimes over black or blue interiors
- **Red** – A few examples were originally red, though some have since been repainted
🧠 Collector Insight
- The **Exclusive Car Registry** lists **seven known colours** for surviving GK1s, with **metallic burgundy** and **black** among the most frequently recorded.
- Colour originality can significantly affect value—cars retaining their **factory paint codes** or restored in original hues tend to command stronger premiums.
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Main Rivals (Price): In **1964**, the **Gordon Keeble GK1** faced competition from several high-performance grand tourers. Here are estimated new prices of its main rivals in the UK at the time:
- **Aston Martin DB5** – Around **£4,175**
- **Jaguar E-Type 3.8** – Around **£2,097**
- **Ferrari 250 GT Lusso** – Around **£5,000**
- **Iso Rivolta IR 300** – Around **£3,000**
- **Bristol 408** – Around **£3,500**
The **Gordon Keeble GK1**, priced at **£2,798**, was positioned as a **high-performance bargain**, offering **Italian styling, American V8 power, and British craftsmanship** at a lower price than many of its rivals.
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Main Rivals (Performance)
Here’s how the **Gordon Keeble GK1 (1964-66)** compared to its main rivals in terms of performance:
- **Gordon Keeble GK1** – **300 HP**, **0-60 mph in ~6.0 sec**, **top speed: ~140 mph** Review | Honest John](https://classics.honestjohn.co.uk/reviews/gordon-keeble/gk1/).
- **Aston Martin DB5** – **282 HP**, **0-60 mph in ~7.1 sec**, **top speed: ~145 mph**.
- **Jaguar E-Type 3.8** – **265 HP**, **0-60 mph in ~6.9 sec**, **top speed: ~150 mph**.
- **Ferrari 250 GT Lusso** – **240 HP**, **0-60 mph in ~7.0 sec**, **top speed: ~140 mph**.
- **Iso Rivolta IR 300** – **300 HP**, **0-60 mph in ~7.5 sec**, **top speed: ~135 mph**.
- **Bristol 408** – **250 HP**, **0-60 mph in ~8.0 sec**, **top speed: ~130 mph**.
The **GK1** was a serious contender in the **grand tourer segment**, offering **blistering acceleration and high-speed cruising** thanks to its **Chevrolet V8 power** and **lightweight fiberglass body**.
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Engine/Performance
The Gordon Keeble GK1 was powered by a **327 cubic inch (5.4-litre) Chevrolet V8 engine**. This engine was known for its reliability and performance, providing the GK1 with impressive power and a top speed in the region of 140 mph.
The Gordon Keeble GK1 was known for its impressive performance, thanks to its powerful Chevrolet V8 engine.
Here are the key performance specifications:
- **Engine**: 5.4-liter Chevrolet 327 V8 - **Power**: 300 bhp (224 kW) at 5000 rpm - **Torque**: 360 lb-ft (488 Nm) at 3200 rpm
- **Top Speed**: Approximately 145 mph (233 km/h) - **0-60 mph (0-96 km/h)**: Around 6.0 seconds These specifications made the Gordon Keeble GK1 a competitive and desirable sports car in its era.
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Historical Advertisements & Marketing Strategy
The **Gordon-Keeble GK1 (1964–1966)** was marketed with a blend of *understated British elegance and transatlantic performance bravado*, but its advertising and strategy were as unconventional as the car itself.
📢 **Advertising Themes & Messaging**
- **“Built to Aircraft Standards”**
This tagline emphasized the car’s aerospace-grade construction, referencing its glassfibre body and spaceframe chassis—an appeal to engineering-minded buyers.
- **“A New Dimension of Motoring Pleasure”**
Featured in the owner’s handbook and brochures, this phrase positioned the GK1 as a refined, high-speed GT for the *“senior executive or international businessman.”*
- **Performance with Poise**
Ads and brochures highlighted its **Chevrolet V8 power**, **140+ mph top speed**, and **0–60 in ~6 seconds**, but always couched in terms of *effortless touring* rather than raw aggression.
🐢 **Brand Identity & Symbolism**
- **The Tortoise Badge**
A pet tortoise wandered into a photo shoot and was humorously adopted as the marque’s emblem—an ironic nod to the car’s speed. It became a memorable and quirky brand signature.
- **Savoy Hotel Launch (1964)**
The official debut took place at London’s prestigious Savoy Hotel, targeting an elite clientele and reinforcing the car’s luxury credentials.
📈 **Marketing Strategy: Strengths & Missteps**
- **Strengths**
- Leveraged **Giugiaro’s Bertone styling** and American V8 reliability
- Positioned as a *continental cruiser* for discerning buyers
- Priced competitively at **£2,798**, undercutting Aston Martin and Ferrari
- **Challenges**
- **No formal dealer network**—sales were largely direct or through boutique agents
- **Limited advertising budget**—relying on word-of-mouth, press reviews, and motor show appearances
- **Component shortages and strikes** disrupted production, undermining momentum
🧠 Collector Insight
Despite its short life, the GK1’s marketing left a lasting impression. Period brochures and press reviews are now collector items, and the tortoise badge remains one of the most beloved quirks in British motoring history.
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Rarity & Collector Appeal
The **Gordon-Keeble GK1 (1964–1966)** is one of the rarest and most charismatic Anglo-Italian GTs of the 1960s, with a collector appeal that far exceeds its production numbers.
🔍 **Rarity**
- **Total Production:** Only **99 cars** were built, plus **1 assembled from spares** in 1970.
- **Survivorship:** Over **80 examples** are known to survive—an astonishing rate of **~80%**, thanks to the car’s rust-proof glassfibre body and devoted ownership.
- **Chassis Numbers:** Each car was individually numbered, and many are traceable through the **Gordon-Keeble Owners’ Club** and marque historians.
🌟 **Collector Appeal**
- **Design Pedigree:** Styled by a 21-year-old **Giorgetto Giugiaro** at Bertone—his first GT design—giving it immense historical significance.
- **Performance:** Powered by a **Chevrolet 327 V8**, delivering ~300 bhp and 0–60 in ~6.2 seconds—on par with Aston Martin and Ferrari contemporaries.
- **Build Quality:** Aircraft-inspired spaceframe chassis and glassfibre body gave it a reputation for durability and innovation.
- **Quirky Charm:** The **tortoise badge**, adopted after a pet wandered into a photo shoot, adds a layer of cult appeal.
- **Celebrity Ownership:** Notables like **Victor Gauntlett** (former Aston Martin chairman) and **Baron Tanlaw** have owned GK1s, enhancing provenance.
📈 Market Position
- **Auction Sell-Through Rate:** 100% since 2020—every GK1 offered has sold.
- **Concours Examples:** Cars like **chassis #93** (metallic burgundy, cream interior) are considered among the finest survivors and command top-tier prices.
- **Investment Grade:** B+ — niche but rising, especially as Giugiaro’s early work gains recognition.
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Recorded in UK 2025
The **Gordon Keeble GK1 (1964-66)** is an incredibly rare car, with only **99 units** originally produced. As of **2025**, most of these cars are still accounted for, with many in **private collections, classic car museums, and enthusiast ownership**.
While exact registration numbers for road use in the UK are difficult to pinpoint, the **Gordon Keeble Owners Club** actively tracks surviving examples, and it's estimated that around **80-90 cars** remain in existence worldwide.
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Target Age Group: The **Gordon Keeble GK1 (1964-66)** was aimed at **wealthy enthusiasts and professionals** who wanted a **high-performance grand tourer** without the price tag of an Aston Martin or Ferrari. It appealed to **executives, sports car aficionados, and collectors** who valued its **Italian styling, American V8 power, and British craftsmanship**.
Despite its **limited production of just 99 units**, the GK1 gained a cult following among those who appreciated **exclusive, hand-built GT cars**.
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Influence of Target Age Group:
The **Gordon-Keeble GK1 (1964–1966)** was deliberately aimed at a **mature, affluent audience**—typically **middle-aged professionals, senior executives, and international businessmen**—rather than the younger sports car crowd drawn to Jaguars or Triumphs. This target age group had a profound influence on the car’s design, marketing, and long-term collector appeal.
🎯 **Design Influences from the Target Age Group**
- **Refined Styling**: Giugiaro’s clean, understated lines projected *continental sophistication* rather than youthful flamboyance.
- **Spacious Cabin**: The GK1 offered genuine **four-seat comfort**, with ample legroom and a large boot—ideal for long-distance touring, not weekend racing.
- **Effortless Performance**: The 327ci Chevrolet V8 delivered **smooth, torque-rich power**, appealing to drivers who valued *grand touring ease* over raw aggression.
📢 **Marketing Language & Positioning**
- Phrases like *“a new dimension of motoring pleasure”* and *“built to aircraft standards”* were crafted to resonate with **discerning, status-conscious buyers**.
- The launch at the **Savoy Hotel** and the use of **aviation metaphors** reinforced its appeal to a clientele accustomed to luxury and international travel.
🧠 Collector Insight
- The car’s original buyers were often **well-connected professionals**, which has led to **strong provenance trails** and high survival rates.
- Today, the GK1’s appeal still skews toward **mature collectors** who appreciate its blend of rarity, elegance, and engineering integrity—rather than younger buyers chasing badge prestige.
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Parts Bin Engineering
The **Gordon-Keeble GK1 (1964–1966)** is a textbook case of smart *parts bin engineering*—a boutique GT that blended off-the-shelf reliability with bespoke flair. Here's how it came together:
🧩 **Key Parts Bin Components**
- **Engine:**
- *Chevrolet 327ci V8* (Corvette-spec)
- Sourced directly from General Motors—offering 300 bhp and bulletproof reliability
- Parts interchangeability with U.S. muscle cars makes maintenance surprisingly manageable
- **Gearbox:**
- *Borg-Warner T10 4-speed manual*
- Widely used in American performance cars of the era
- **Rear Axle:**
- *Salisbury unit* (Jaguar E-type spec)
- Known for strength and smoothness—ideal for high-torque applications
- **Brakes:**
- *Front:* Humber Hawk discs
- *Rear:* Daimler SP250 “Dart” components
- A clever mix that provided four-wheel disc braking at a time when many rivals still used drums
- **Rear Lights:**
- *Fiat 2300 Coupé* (early cars)
- *Ferrari 250 GTE* (later cars)
- A rare crossover with Italian exotica—though replacements today are costly
- **Steering Box:**
- *Adwest* unit (also used in Rover P5)
- Ironically, a strike at Adwest in 1965 halted production and contributed to the company’s collapse
🧠 Why It Worked
This hybrid approach allowed Gordon-Keeble to:
- **Reduce development costs**
- **Ensure parts availability** (especially in the U.S.)
- **Deliver high performance** without bespoke mechanicals
Yet the car still felt bespoke thanks to:
- A **Giugiaro-designed body**
- A **spaceframe chassis**
- A **luxurious, hand-finished cabin**
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Spares
For spares and parts for a Gordon Keeble GK1 in the UK or Ireland, you have a few options:
1. **Gordon-Keeble Owners' Club**: This is a great resource for enthusiasts and owners. They can provide information on sourcing parts and may have members who can help you find what you need.
2. **eBay**: Occasionally, you can find parts for the Gordon Keeble GK1 listed on eBay. It's worth checking regularly for any new listings.
3. **Classic Car Specialists**: Websites like Car and Classic often have listings for classic car parts, including those for the Gordon Keeble GK1.
4. **Bonhams Auctions**: Sometimes, parts or even entire cars are available through classic car auctions.
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Specialists NI
Finding a mechanic experienced with the Gordon Keeble GK1 can be challenging due to its rarity, but here are some options in the UK and Ireland:
1. **Ernie Knott**: Known as a Gordon-Keeble expert, Ernie Knott has a long history of working on these cars and even set up the Gordon-Keeble Centre for repair and development in Brackley.
2. **Classic Car Specialists**: Look for classic car specialists who have experience with rare and vintage vehicles. Some well-regarded ones include: - **Graeme Hunt Ltd.**: They have experience with Gordon Keeble GK1s and have handled full restorations. - **Bonhams Auctions**: They often handle classic cars and may have connections to mechanics who specialize in rare models.
3. **Gordon-Keeble Owners' Club**: This club can be an invaluable resource. Members often share information about trusted mechanics and service providers.
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Manufacturer Recommended
Engine Oil: The **factory-recommended engine oil** for the **Gordon-Keeble GK1 (1964–1966)**—which used the **Chevrolet 327ci (5.4L) small-block V8**—was typically a **high-zinc 20W-50 mineral oil**, suitable for flat-tappet camshafts and high-load conditions.
🛢️ Factory-Spec Oil Characteristics
- **Viscosity:** SAE 20W-50
- **Type:** Mineral-based
- **ZDDP Content:** High (for camshaft protection)
- **Change Interval:** ~3,000 miles or annually
This recommendation aligned with **Chevrolet Corvette specs** of the era, as the GK1 used a Corvette-spec engine with similar tolerances and lubrication needs.
🔄 **Modern Equivalents (2025)**
Here are some **readily available oils** that match or exceed the original spec:
| Brand | Product | Type | ZDDP Level | Notes |
|-------|---------|------|------------|-------|
| **Millers Oils** | *Classic Sport 20W50* | Mineral | High | UK-made, ideal for high-performance classics |
| **Valvoline** | *VR1 Racing 20W50* | Mineral | ~1,300 ppm | Widely used in vintage V8s |
| **Penrite** | *Classic Light 20W50* | Mineral | High | Designed for flat-tappet engines |
| **Lucas Oil** | *Hot Rod & Classic 20W50* | Mineral | High | Excellent for long-term storage and protection |
| **Driven Racing Oil** | *HR2 20W50* | Semi-synthetic | High | Developed for classic American V8s |
🧠 Collector Tip
- **Avoid modern low-zinc oils** (API SN/SM) unless the engine has been rebuilt with a roller camshaft.
- **Warm-up matters**: These engines benefit from gentle warm-up before spirited driving, especially with thicker oils.
- **Oil filters**: Use a high-flow filter compatible with the Corvette 327 block—Fram PH30 or WIX 51069 are common choices.
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Transmission Oil:
The **Gordon-Keeble GK1 (1964–1966)** used the **Borg-Warner T10 4-speed manual gearbox**, a robust unit also found in period Corvettes and other American performance cars. The **factory-recommended transmission oil** would have been a **GL-4 SAE 90 gear oil**, suitable for synchronized manual gearboxes of the era.
🛢️ **Factory-Spec Transmission Oil**
- **Type:** Mineral-based gear oil
- **Viscosity:** SAE 90 (or SAE 80W-90 in cooler climates)
- **API Rating:** GL-4 (not GL-5, which can damage yellow metals in synchros)
🔄 **Modern Equivalents (2025)**
Here are some **readily available GL-4 gear oils** that match the original spec:
| Brand | Product | Viscosity | Notes |
|-------|---------|-----------|-------|
| **Red Line** | *MT-90* | 75W-90 | Fully synthetic, GL-4 safe for synchros |
| **Castrol Classic** | *EP 90* | SAE 90 | Mineral oil, period-correct feel |
| **Millers Oils** | *Classic Gear Oil 90 GL-4* | SAE 90 | UK-made, ideal for vintage gearboxes |
| **Penrite** | *Mild EP Gear Oil* | SAE 90 | GL-4, yellow-metal safe |
| **Liqui Moly** | *GL-4 High Performance Gear Oil* | 80W-90 | Excellent for classic applications |
⚠️ Important Notes
- **Avoid GL-5 oils** unless explicitly marked as yellow-metal safe—they can corrode synchro rings over time.
- **Synthetic vs. Mineral**: Synthetics like Red Line MT-90 offer smoother shifts, but some purists prefer the period-correct feel of mineral oils.
- **Change Interval**: Every 20,000–30,000 miles or 5 years, depending on usage.
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Tyres: The **factory-recommended tyres** for the **Gordon-Keeble GK1 (1964–1966)** were **185R15 crossply or early radial tyres**, typically mounted on **15-inch steel wheels**. These were consistent with other high-performance GTs of the era and offered a balance of ride comfort and handling for a car capable of 140+ mph.
🛞 **Factory Tyre Specification**
- **Size:** 185R15
- **Type:** Crossply (early cars) or radial (later examples/restorations)
- **Load Rating:** ~91 (615 kg per tyre)
- **Speed Rating:** H or V (130–149 mph)
🔄 **Modern Equivalents (2025)**
Here are some **period-correct radial replacements** that preserve the GK1’s handling and aesthetic:
| Brand | Model | Size | Type | Notes |
|-------|-------|------|------|-------|
| **Blockley** | *185VR15 Radial* | 185VR15 | Radial | Designed for 1960s GTs; authentic tread pattern |
| **Michelin** | *XVS-P* | 185HR15 | Radial | Classic look with modern grip; ideal for concours |
| **Pirelli** | *Cinturato CA67* | 185VR15 | Radial | Period-correct for 1960s Ferraris and GTs |
| **Avon** | *Turbosteel 70* | 205/70VR15 | Radial | Slightly wider; used on some upgraded GK1s |
| **Vredestein** | *Sprint Classic* | 185HR15 | Radial | Affordable and widely available |
🧠 Collector Tip
- **Blockley 185VR15** is the most authentic fitment and is often used by GK1 restorers and concours entrants.
- **205/70VR15** is a common modern substitute for 185R15, offering a similar rolling diameter with improved grip—but may require clearance checks.
- Always check **date codes** and **load/speed ratings** when sourcing classic tyres.
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Petrol: The **Gordon-Keeble GK1 (1964–1966)**, powered by the **Chevrolet 327ci (5.4L) small-block V8**, was originally tuned for **high-octane leaded petrol**, consistent with Corvette specifications of the era.
⛽ **Factory-Spec Fuel Characteristics**
- **Octane Rating:** ~98 RON (equivalent to ~93–94 AKI in the U.S.)
- **Type:** Leaded petrol (standard in the 1960s)
- **Compression Ratio:** 10.5:1
This relatively high ratio required premium-grade fuel to prevent knocking.
🔄 **Modern Equivalents (2025)**
Since leaded petrol is no longer available for road use, here are the best modern substitutes:
| Fuel Type | Octane | Notes |
|-----------|--------|-------|
| **Shell V-Power** (UK) | 99 RON | Widely available, ethanol content ≤5% (E5) |
| **Esso Synergy Supreme+ 99** | 99 RON | In many UK regions, **ethanol-free**—ideal for classics |
| **BP Ultimate Unleaded** | 97 RON | Acceptable, but slightly lower octane |
| **Super Unleaded (E5)** | 97–98 RON | Generic premium fuel; check ethanol content |
| **Sunoco Optima 98/102** | 98–102 RON | Specialist classic fuel, available at motorsport outlets |
🧠 Classic Car Tip
- **Ethanol Awareness**: Ethanol can degrade rubber fuel lines and gaskets in older cars. Stick to **E5 fuels** or ethanol-free options like Esso Supreme+ (where available).
- **Octane Boosters**: If only 95 RON is available, use a **lead substitute with octane booster** (e.g., Millers VSPe Power Plus or Castrol Valvemaster Plus).
- **Storage**: For long-term storage, consider **ethanol-free fuel** or use a stabilizer to prevent phase separation.
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Racing
The Gordon Keeble GK1 itself did not have a notable racing history. However, an early prototype of the GK1, known as the Gordon-Keeble GT, did feature in the classic racing film "The Green Helmet". This prototype was extensively campaigned in various events before the production model was finalized. While the GK1 was more of a grand tourer designed for luxury and performance on the road, its powerful Chevrolet V8 engine and advanced engineering made it a car with impressive capabilities.
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Valuation
The value of a Gordon Keeble GK1 today can vary based on its condition and provenance. Here are some general price ranges: - **Project Cars**: Starting around £20,000. - **Good Condition**: Approximately £67,500. - **Excellent Condition**: Up to £139,000. These values can fluctuate based on market demand and the specific condition of the car. *****
Investment Assessment
I’d give the **Gordon-Keeble GK1 a solid 3.5 out of 5** for financial investment—rounded to **⭐️⭐️⭐️⭐️ (4/5)** if you're a savvy enthusiast who values rarity and long-term upside.
📊 **Why 4/5 – A Strong Niche Performer**
**Positives:**
- **Ultra-low production** (just 100 units) + **high survival rate (~80%)** = tightly held, limited supply
- **Sell-through rate since 2020:** 100% — every GK1 offered at auction has sold
- **Rising values:** From ~£23k in 2000s to **£85k+** today; Concours cars now valued at **£123,000**
- **Design pedigree:** Giugiaro's first GT; increasingly recognised by collectors
- **Strong provenance support:** Active Owners’ Club, registry documentation, and specialist restoration interest
**Caveats:**
- **Liquidity risk**: It’s a niche market — you may need to wait for the right buyer
- **Parts availability**: While mechanical bits are accessible (thanks to Corvette underpinnings), some trim and lighting elements are rare and costly
- **Lacks badge prestige**: Compared to Aston Martin or Ferrari, the name has less brand pull among casual collectors
🧠 Investor Insight
If you already appreciate low-production GTs and have an eye for design legacy, the GK1 punches far above its weight. It won't spike in value overnight, but it's a graceful climber—especially as more collectors recognise it as a transatlantic gem.
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Clubs
There isn’t a dedicated **Gordon Keeble GK1 owners club** specifically for **Northern Ireland**, but the **Gordon Keeble Owners Club** in the UK is the main hub for enthusiasts. They provide **historical information, restoration support, and events** for GK1 owners across the UK and beyond.
If you're looking for local connections, classic car clubs in **Northern Ireland**—such as the **Ulster Vintage Car Club** or **NI Classic Car Club**—might have members with GK1s or knowledge of them.
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HISTORY
The **Gordon Keeble** car company was founded in **1964** in the UK, but its origins trace back to **1959**, when **John Gordon** and **Jim Keeble** collaborated to create a high-performance British grand tourer.
**History of Gordon Keeble**
- **1959** – The first prototype, the **Gordon GT**, was developed with a **Chevrolet Corvette V8** engine and a chassis by **Peerless**.
- **1960** – The car was refined and displayed at the **Geneva Motor Show**, where it caught the attention of Chevrolet executives.
- **1964** – The company officially launched the **Gordon Keeble GK1**, featuring a **fiberglass body designed by Giorgetto Giugiaro at Bertone**.
- **1965** – Financial difficulties led to the company being restructured as **Keeble Cars Ltd**.
- **1966** – Production ceased after only **99 cars** were built, making it a rare collector’s item.
- **1967** – The company officially closed, but the GK1 remained a cult classic.
Despite its short-lived existence, the **Gordon Keeble GK1** is remembered as a **stylish, high-performance grand tourer** that combined **Italian design, American muscle, and British craftsmanship**.
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**Gordon Keeble** did not continue manufacturing vehicles after **1967**. The company faced **financial difficulties**, and despite an attempt to restructure as **Keeble Cars Ltd**, production ceased after only **99 units** of the **GK1** were built.
Although the brand disappeared, the **GK1** remains a **cult classic**, cherished by enthusiasts for its **Italian styling, American V8 power, and British craftsmanship**.
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