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Jaguar XK 120 (1948-54)

Production Total: The Jaguar XK120 had a total production run of **12,055 units** from 1948 to 1954.
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Price New: In 1948, the new price of a Jaguar XK120 in the UK was approximately £1,263.
The new price of a Jaguar XK 120 in 1948 was approximately **£1,263**. Adjusted for inflation to 2025, this would roughly equate to **£50,000**.
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Rivals: In 1948, the main rivals to the Jaguar XK120 had the following approximate new prices in the UK:

### Aston Martin 2-Litre Sports (DB1)
- **Price**: Around £2,331

### Austin-Healey 100
- **Price**: Around £850

### MG TC
- **Price**: Around £527

These prices reflect the competitive landscape of sports cars during that era.
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Recorded in UK 2025
As of 2025, there are approximately 1,200 Jaguar XK120s recorded in the UK.
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PLEASE NOTE: The information provided below is given in averages across Northern Ireland at the date specified. Petrol reflect average prices for four star fuel in litres.

Road Tax: In 1948, the road tax (Vehicle Excise Duty) for a Jaguar XK120 in the UK was based on the engine size. For cars with engines over 1549cc, like the Jaguar XK120, the annual road tax was approximately £10.
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Petrol: In 1948, the price of four-star petrol in the UK was approximately **5.5 pence per litre**.
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Insurance: I couldn't find the exact average price of insurance for a Jaguar XK120 in the UK in 1948. However, insurance costs for classic cars like the Jaguar XK120 can vary widely based on factors such as the driver's age, location, and driving history.
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Jaguar XK 120 (1948-54)

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 classic Jaguar XK 120—a true icon of automotive elegance and performance! While these vintage beauties certainly evoke a sense of nostalgia, they do come with their quirks and common issues. Let's dive into some of the typical faults you might encounter with an XK 120:

1. **Rust Problems**: Like many British cars of that era, rust can be a persistent adversary for XK 120 owners. Keep an eye out for rust in critical areas such as the sills and rear frame extensions. These parts tend to corrode over time, so thorough inspections are essential. If you find poor door gaps, that could be a sign of underlying rust issues².

2. **Overheating**: The XK 120's cooling system can sometimes struggle, especially during hot weather or prolonged idling. Regular maintenance of the radiator, hoses, and water pump is crucial. Consider upgrading to a more efficient radiator if you plan on driving your XK 120 frequently.

3. **Front Bodywork Damage**: The stock brakes on the XK 120 were not its strongest suit. As a result, some owners experienced front bodywork damage due to inadequate braking performance. If you're restoring or maintaining one, consider upgrading the braking system to improve safety.

4. **Electrical Gremlins**: Vintage cars often have quirky electrical systems, and the XK 120 is no exception. Check wiring, fuses, and connections regularly. Sometimes, a simple loose wire can cause mysterious issues.

5. **Suspension and Steering Components**: The XK 120's suspension and steering components can wear out over time. Inspect ball joints, tie rods, and bushings. Proper lubrication and occasional replacement are essential for maintaining a smooth ride.

6. **Oil Leaks**: Older engines tend to develop oil leaks. Keep an eye on gaskets, seals, and the oil pan. Regular oil changes and inspections will help prevent major leaks.

7. **Coolant Leaks**: The cooling system can spring leaks, leading to overheating. Check hoses, the water pump, and the radiator for any signs of coolant leakage.
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Generations/Trim Levels
Generations and trim levels of vehicles often vary between countries as manufacturers tailor models to meet the preferences and requirements of specific markets. For example, a trim level designated as “GL” in the UK might be labelled as “XS” in another country. Due to these regional differences, the information provided on this site pertains exclusively to UK-specific products.

1. **First Generation (1948–1954)**:
- The XK120 was Jaguar's first post-war sports car, succeeding the SS 100. It made its debut in roadster form at the 1948 London Motor Show.
- Initially, the XK120 featured wood-framed open two-seater bodies with aluminum panels. These early models were lightweight and agile.
- The name "XK120" itself hinted at its top speed: 120 mph (193 km/h), which was quite impressive for its time.
- Fun fact: The first production XK120, chassis number 670003, was even delivered to none other than the legendary actor Clark Gable in 1949¹.

2. **Second Generation (1951–1954)**:
- In 1951, Jaguar introduced the fixed head coupé (FHC) version of the XK120. This model had a sleeker, enclosed body style.
- The FHC retained the XK120's performance but added a touch of refinement with its fixed roof.
- These coupés were equally desirable and found favor among enthusiasts who appreciated both style and speed.

3. **Third Generation (1953–1954)**:
- The drophead coupé (DHC) variant arrived in 1953. This version combined the best of both worlds: open-top motoring and a more luxurious feel.
- With its folding convertible top, the DHC allowed XK120 owners to enjoy the wind in their hair while cruising.
- The DHC models are particularly sought after today due to their timeless design and versatility.

So, in summary, the Jaguar XK120 was available in three main body styles: the open two-seater (roadster), the fixed head coupé (FHC), and the drophead coupé (DHC). Each generation had its unique charm, whether it was the raw exhilaration of the roadster or the refined elegance of the coupés. And let's not forget that XK engine—it truly set the stage for Jaguar's future sports cars!
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Trim Levels

1. **Standard Model**:
- The base XK120 was a thing of beauty in itself. With its sleek lines, long hood, and flowing fenders, it captured the hearts of enthusiasts worldwide.
- These early XK120s featured minimalistic interiors, often adorned with leather seats, a wood-rimmed steering wheel, and simple instrumentation.

2. **SE (Special Equipment)**:
- The SE option was a popular choice for XK120 buyers. It added a touch of performance and style.
- Key features of the SE included:
- **Increased Power**: SE models boasted an additional 20 bhp (brake horsepower) compared to the standard version. This power boost came from high-lift cams, uprated valve springs, and a lighter flywheel.
- **Wire Wheels**: SEs came equipped with wire-spoke wheels, which not only looked fantastic but also improved handling.
- **Other Upgrades**: Some SEs received additional enhancements like improved suspension components and better brakes.

3. **Customization and Aftermarket Modifications**:
- Beyond the factory trim levels, many XK120 owners personalized their cars. Some added bespoke interior touches, unique upholstery, or custom woodwork.
- Wire wheels, although originally an SE feature, became a popular retro-fit on non-SE models. So, if you spot an XK120 with those elegant wire wheels, it's likely been lovingly upgraded.

Remember, the XK120 was as much about the wind in your hair as it was about the thrill of driving. Whether you prefer the raw simplicity of the base model or the added zest of the SE, each XK120 has its own story to tell.
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Engines
The XK120 was powered by an exquisite inline-six engine known as the **XK engine**. Here are the juicy details:

1. **Engine Specifications**:
- **Displacement**: The XK engine had a displacement of 3.4 litres (or 3,441 cc, to be precise). That's the equivalent of a symphony of pistons and cylinders working in harmony.
- **Configuration**: It was a dual overhead-cam (DOHC) straight-six, which means it had two camshafts nestled up top, orchestrating the dance of the valves.
- **Materials**: The XK engine was ahead of its time. It flaunted a high-temperature, high-strength aluminium alloy cylinder head—a bit like having a titanium tuxedo for your engine.
- **Combustion Magic**: Picture hemispherical combustion chambers (yes, like little domes where the magic happens), inclined valves, and twin side-draft SU carburettors. All this wizardry contributed to its performance.

2. **Power Output**:
- In its standard form, the XK120 engine churned out between 160 and 180 brake horsepower (bhp). Not too shabby, right?
- But wait, there's more! The XK120 wasn't content with just being "standard." The C-Type version (a racing variant) was tuned to around 205 bhp. That's like giving your morning coffee a double shot of adrenaline!

3. **Speed Demon**:
- The name "XK120" itself hinted at its top speed: 120 mph (193 km/h). And guess what? With the windscreen removed, it could go even faster!
- In fact, during a daring run on the empty Ostend-Jabbeke motorway in Belgium, a prototype XK120 achieved an average of 132.6 mph (213.4 km/h) with just a tiny aero screen in place. Add a passenger-side tonneau cover, and it hit a whopping 135 mph (217 km/h)!
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Performance
The XK120 burst onto the scene like a comet, leaving jaws dropped and hearts racing. Here's what made it so special:

1. **Top Speed**: When tested, the XK120 achieved a top speed of **124.6 mph (200.5 km/h)**. Imagine hurtling down the open road with the wind in your hair—pure exhilaration!

2. **Acceleration**: From a standstill to **60 mph (97 km/h)**, the XK120 did the sprint in a brisk **10.0 seconds**. That's quicker than a startled gazelle!

3. **Fuel Efficiency**: Despite its performance prowess, the XK120 was surprisingly frugal. It sipped fuel at the rate of **19.8 miles per imperial gallon** (that's about **14.3 litres per 100 kilometres** or **16.5 miles per U.S. gallon**). Not bad for a thoroughbred sports car, eh?

And here's a fun titbit: The XK120 was the world's fastest production car at the time of its debut. Picture it: sleek lines, that iconic grille, and an engine that roared like a contented tiger. No wonder it left a trail of awe wherever it went!
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Rivals
In 1948, the main rivals to the Jaguar XK120 offered the following performance:

### Aston Martin 2-Litre Sports (DB1)
- **Engine**: 2.0-litre inline-4
- **Power**: 90 bhp
- **Top Speed**: 93 mph
- **0-60 mph**: Approximately 11.4 seconds

### Austin-Healey 100
- **Engine**: 2.7-litre inline-4
- **Power**: 90 bhp
- **Top Speed**: 106 mph
- **0-60 mph**: Approximately 10.5 seconds

### MG TC
- **Engine**: 1.3-litre inline-4
- **Power**: 54 bhp
- **Top Speed**: 78 mph
- **0-60 mph**: Approximately 22.7 seconds

These performance figures highlight the competitive landscape of sports cars during that era.
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Designer/Dimensions
The Jaguar XK120 was designed by **William Lyons**, the founder and design boss of Jaguar.

### Dimensions of the Jaguar XK120:
- **Wheelbase**: 102 inches (2,591 mm)
- **Length**: 173 inches (4,394 mm)
- **Width**: 61.5 inches (1,562 mm)
- **Height**: 52.5 inches (1,334 mm).
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Spares/Specialists NI
When it comes to keeping your beloved Jaguar XK120 in tip-top shape, sourcing quality spares is essential.

1. **Coventry Auto Components**:
- **Location**: Coventry, UK
- **Specialty**: Coventry Auto Components is the oldest established and only remaining dedicated manufacturer and retailer of parts for XK120, XK140, and XK150 Jaguars. They're like the wizards of XK restoration!
- **What They Offer**: From steel pedals to stainless steel shims, they've got a wide range of parts. Plus, they're always expanding their manufacturing to include harder-to-find components.
- **Why Check Them Out**: Their reputation spans over 50 years, and they're the cornerstone of the Classic XK world. Stuart MacNeill, the director, is also a proud owner of an immaculate new-generation Jaguar XK.
- **Website**: [Coventry Auto Components](https://www.coventryautocomponents.co.uk/)

2. **Moss Europe**:
- **Location**: Various locations in the UK (online ordering available)
- **Specialty**: Moss Europe is a trusted name in classic car parts. They offer fast shipping, easy returns, and thousands of parts always in stock.
- **What They Offer**: You'll find a comprehensive selection of parts and spares for your XK120, XK140, and XK150.
- **Why Check Them Out**: Their reliability and extensive inventory make them a go-to source for enthusiasts.
- **Website**: [Moss Europe - Jaguar XK120, XK140 & XK150 Parts](https://www.moss-europe.co.uk/en-gb/vehicle/jaguar/xk120-xk140-xk150)

3. **Guy Broad Parts**:
- **Location**: Leicestershire, UK
- **Specialty**: Guy Broad Parts is all about the Jaguar XK series. They've amassed a huge stock of thousands of parts specifically for XK120, XK140, and XK150 classic cars.
- **What They Offer**: Whether it's mechanical bits, trim pieces, or rare components, they've got you covered.
- **Why Check Them Out**: Their dedication to the XK series ensures that you'll find everything you need.
- **Website**: [Guy Broad Parts - Jaguar XK120, 140, 150 Parts and Accessories](https://www.guybroad.co.uk/parts/)

4. **Northern Jaguar**:
- **Location**: Northern Ireland (Republic of Ireland)
- **Specialty**: Northern Jaguar stocks a large selection of XK120 parts, including engines in varying conditions.
- **What They Offer**: From cylinder blocks to gearboxes, they've got the essentials for XK120 enthusiasts.
- **Why Check Them Out**: If you're in the Republic of Ireland, this could be your local gem for XK120 spares.
- **Website**: [Northern Jaguar - XK120 Parts](https://www.northernjaguar.com/xk120-parts)

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Specialists NI
When it comes to keeping your beloved Jaguar XK120 in tip-top shape, sourcing quality spares and finding a skilled mechanic is crucial. Here are some excellent options in Northern Ireland:

1. **Stephen Groves Jaguar Specialist**:
- **Location**: Based in Northern Ireland, Stephen Groves Jaguar Specialist caters to customers across the region, including Belfast, Hillsborough, and Lisburn.
- **Expertise**: With over 30 years of experience, Stephen Groves is a well-established and respected independent Jaguar specialist. They know their way around these iconic cars like a maestro conducting a symphony.
- **Services Offered**:
- **Jaguar Servicing**: Regular maintenance is the heartbeat of any classic car. Stephen Groves offers top-class servicing, including dealer-level diagnostics and software upgrades.
- **Repair Work**: Whether it's tuning keys, resetting onboard computers, or diagnosing fault codes, they've got you covered.
- **MOT Preparation**: Need your XK120 ready for its MOT? They've got that covered too.
- **Testimonial**: One satisfied customer said, "I have no hesitation in recommending him for all your Jaguar needs. Very professional job at a fair price."
- **Contact**: You can reach them at **028 9268 9006**.

2. **Blakely Vehicle Services**:
- **Location**: Also based in Belfast, Blakely Vehicle Services has over 15 years of experience repairing all types of Jaguars, including the XK120.
- **Repair Expertise**: From minor repairs to full engine rebuilds, they've got the know-how. Plus, they offer both new genuine Jaguar parts and used/reconditioned parts.
- **Independent Jaguar Specialist**: Gareth Blakely, the man behind the magic, has quickly become the go-to independent Jaguar specialist in Northern Ireland.
- **Contact**: If you're near Belfast, give them a shout!
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Racing
The Jaguar XK120 wasn't content with just being a stylish roadster—it also had a need for speed! Let's dive into its racing adventures:

1. **Speed Tests and Legend**:
- In May 1949, the XK120 cemented its legendary status by achieving a blistering **132.6 mph** (with the windscreen replaced by a tiny aero screen) and **126 mph** in standard form on the Jabbeke highway in Belgium. Imagine hurtling down that empty stretch of road, wind in your hair, and the XK120 growling like a contented big cat!
- It was the world's fastest production car at the time of its debut, and those speed tests left everyone in awe¹.

2. **Motorsport Success**:
- Drivers behind the wheel of XK120s achieved considerable success in motorsport. In July 1949, three XK120s were entered into the first big UK motor race since the war at Silverstone. Leslie Johnson and Peter Walker piloted these sleek cats, leaving the rest of the field wondering which way they went!
- The XK120's agility, power, and handling made it a force to be reckoned with on the track. It wasn't just a showpiece; it was a fierce competitor³.

3. **TT at Dundrod and the Alpine Rally**:
- In 1950, the XK120 took victory in the Tourist Trophy (TT) race at Dundrod, Northern Ireland. Picture it: the roar of the engine, the twisty circuit, and the XK120 slicing through corners like a precision instrument.
- Not stopping there, it also conquered the treacherous Alpine Rally. The XK120's combination of elegance and performance made it a true all-rounder.

4. **Le Mans Near Miss**:
- The XK120 nearly clinched victory at the prestigious 24 Hours of Le Mans. In 1950, it finished a remarkable 12th overall and 1st in its class. Not bad for a car that started as a showpiece!
- Imagine the drama—the sleek curves of the XK120 streaking down the Mulsanne Straight, chasing glory under the French sun.

So, whether it was tearing down a Belgian highway, conquering racetracks, or aiming for Le Mans glory, the XK120 proved it had both style and substance. It wasn't just a car; it was an automotive legend.

The Jaguar XK120 wasn't just a stylish roadster; it also had a need for speed and found its way into the hands of some legendary drivers. Let's take a spin through XK120 history with these notable names behind the wheel:

1. **Clark Gable**:
- The first production XK120, chassis number 670003, was originally owned by none other than the iconic actor **Clark Gable**. Imagine Gable, with his classic Hollywood charm, cruising in that sleek roadster—it's like a scene from a vintage film!

2. **Gary Cooper, Humphrey Bogart, and Tyrone Power**:
- These Hollywood stars also fell for the XK120's allure. **Gary Cooper**, known for his rugged roles, likely felt right at home behind the wheel.
- **Humphrey Bogart**, the epitome of cool, probably leaned back, adjusted his fedora, and let the XK120's engine purr.
- And **Tyrone Power**, with his dashing looks, surely turned heads as he drove this automotive masterpiece.

3. **Stirling Moss**:
- The legendary racing driver **Stirling Moss** had his moment with an XK120. He won the Ulster Tourist Trophy Race at Dundrod in Tommy Wisdom's XK120 (registration JWK988). Picture Moss pushing the limits, taking those corners with precision—it's a racing memory etched in time.

4. **Peter Whitehead, Leslie Johnson, and Tazio Nuvolari**:
- These names resonate in motorsport history, and they all had their hands on the XK120's steering wheel.
- **Peter Whitehead**—a skilled racer—likely reveled in the XK120's balance of power and grace.
- **Leslie Johnson**, another racing stalwart, pushed the limits of the XK120 on the track.
- And let's not forget the legendary Italian driver **Tazio Nuvolari**, who added his touch to the XK120's legacy.

5. **Norman Dewis**:
- While not a famous driver per se, **Norman Dewis**, Jaguar's chief test driver, deserves a nod. In 1953, he piloted a modified XK120 to a record-breaking **172.412 mph** at Jabbeke, Belgium. That's like strapping a rocket to a feline!

So, whether it was Hollywood glamour, racing prowess, or sheer speed, the XK120 attracted a star-studded cast. Each driver left their mark on this automotive icon, making it more than just a car—it became a legend.

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Valuation
The value of a 1948 Jaguar XK120 in the UK in 2025 can vary widely based on its condition, history, and originality. On average, a well-maintained Jaguar XK120 can be valued between **£514,073 and £1,319,180**.
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Clubs
There are Jaguar XK120 owners clubs in Northern Ireland. The [Jaguar Enthusiasts' Club](https://jec.org.uk/regions/ni) has a dedicated section for Jaguar owners in Northern Ireland. They organize events, meetups, and provide a platform for Jaguar enthusiasts to connect and share their passion.

Additionally, the [Jaguar Drivers' Club Area 30](https://jec.org.uk/regions/ni) in Northern Ireland welcomes all Jaguar owners and organizes various activities and social gatherings.
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