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Jaguar XJ6 4.2 (1968-73)

Production Total: The total production of the Jaguar XJ6 from 1968 to 1973 was approximately 59,077 units for the 4.2-litre version and 19,322 units for the 2.8-litre version.
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Price New: The new price of a Jaguar XJ6 4.2 in the UK in 1968 was approximately £2,000.
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Rivals: In 1968, the main rivals to the Jaguar XJ6 4.2 had the following approximate new prices in the UK:

- **Rover 3.5 Litre (P5B)**: Around £2,222 - AROnline](https://www.aronline.co.uk/cars/jaguar/xj6-xj12/2.8-standard/)
- **Mercedes-Benz 280SE**: Around £3,000 - AROnline](https://www.aronline.co.uk/cars/jaguar/xj6-xj12/2.8-standard/)
- **BMW 2500**: Around £2,500 - AROnline](https://www.aronline.co.uk/cars/jaguar/xj6-xj12/2.8-standard/)
- **Daimler Sovereign**: Around £2,303 - AROnline](https://www.aronline.co.uk/cars/jaguar/xj6-xj12/2.8-standard/)

These prices reflect the competitive landscape of luxury sedans during that era.
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As of 2025, there are approximately 132 Jaguar XJ6 4.2 models licensed and 322 on SORN (Statutory Off Road Notification) 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 1968, the cost of road tax (Vehicle Excise Duty) for a Jaguar XJ6 in the UK was based on the engine size. For cars with engines over 1549cc, like the Jaguar XJ6, the annual road tax was approximately £25.
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Petrol: In 1968, the cost of four-star petrol in the UK was approximately 29 pence per gallon. This translates to about 6.4 pence per litre.
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Insurance: I couldn't find the exact average cost of insurance for a Jaguar XJ6 4.2 in Northern Ireland in 1968. However, insurance costs for classic cars like the Jaguar XJ6 can vary widely based on factors such as the driver's age, location, and driving history.
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Jaguar XJ6 4.2 (1968-73)

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.

1. **Electrical Gremlins**: Jaguars of this vintage were notorious for their electrical systems. From flickering lights to mysterious shorts, it was like they had a secret love affair with the Lucas "Prince of Darkness."

2. **Rust**: Despite being made primarily from aluminum, XJ6s managed to rust in creative places. Keep an eye on the sills, wheel arches, and floor pans. Rust can be a real party pooper for any classic car.

3. **Suspension Woes**: The self-leveling suspension system wasn't always reliable. Compressors had a tendency to give up the ghost, and shock absorbers occasionally threw in the towel. But hey, at least they tried to keep things level!

4. **Fragile Interior Trim**: The interior materials weren't exactly built to withstand the test of time. Door handles breaking off, wood veneer delaminating, and leather seats showing their age—these were all part of the XJ6 experience.

5. **Fuel Economy**: Ah, the three-speed automatic gearbox. It might have been smooth, but it was thirsty. Driving an XJ6 was like having a conversation with a camel about fuel efficiency.

6. **Valve Adjustment and Ignition Timing**: If you're dealing with engine issues, start with the basics. Check valve adjustment and ignition timing. Tight valves can lead to backfiring, and burnt valves are no one's idea of a good time.

Now, about that 1973 XJ6 Series 1 you've got your eye on: It's a classic beauty, but at 37 years old, it's like a wise old sage with a few creaks. The gearbox noise might need attention, and parts availability could be a challenge. On the other hand, the 1990 Sovereign sounds like a more practical choice—better built, more luxury features, and less likely to surprise you with electrical hiccups.
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Generations/Trim Levels
Please Note: Generations and Trim Levels Across Countries
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. **Series I (1968–1973)**:
- The original XJ6 made its debut in 1968 and stayed with us for a whopping 24 years. It was like the wise elder of the Jaguar family, imparting its timeless wisdom.
- Initially, it came as a four-door saloon with a straight-six engine, available in 2.8L and 4.2L variants.
- In 1972, they extended the wheelbase (LWB) and introduced the majestic 5.3L V12 engine. Because why settle for six cylinders when you can have twelve, right?
- Fun fact: The Daimler Sovereign was an upmarket version of the XJ6, carrying on the regal name from the Daimler version of the earlier Jaguar 420.
- Picture it: walnut veneer, leather seats, and a hint of British charm. The Series I XJ6 was the epitome of understated luxury.

2. **Series II (1973–1979)**:
- The '70s brought us the Series II XJ6, with a few tweaks and refinements.
- The standard wheelbase (SWB) saloons were phased out, but fear not—the SWB two-door coupe (yes, coupe!) graced the scene from 1975 to 1978.
- The Series II retained the classic XK engine lineage, but it was all about evolution. Think of it as the XJ6's disco era—still classy, but with a groovy twist.

3. **Series III (1979–1987)**:
- The Series III XJ6 stepped into the '80s with a redesigned greenhouse and snazzier bumpers.
- It bid farewell to the 6-cylinder models (they moved on to the next generation), but the V12 models held on until 1992. Talk about commitment!
- Imagine cruising down the motorway, the V12 purring like a contented cat. Bliss.

4. **XJ40 (1986–1994)**:
- The fourth generation, internally known as the XJ40, arrived just as Ford acquired Jaguar. It was like the XJ6's rebellious phase.
- More angular, yet still unmistakably Jaguar. It's as if the XJ6 decided to wear sharper suits and experiment with geometric shapes.
- Ford's influence was subtle, but the XJ40 had its own charm. A bit like a British spy who secretly loves jazz.

5. **X300 (1995–current)**:
- The X300 took over in the mid-'90s, blending modernity with tradition.
- Sleeker lines, improved technology, and a nod to the past. It's like the XJ6 attended a tech conference and then went for afternoon tea.
- And guess what? It's still around today, proving that some classics never fade away—they just get better with age.

So, my fellow automotive enthusiast, there you have it: five generations of the Jaguar XJ6, each leaving its mark on motoring history. Which one captures your heart? The timeless elegance of the Series I or the futuristic flair of the X300?
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Trim Levels
Let's explore the different trim flavours that adorned this iconic saloon over the years:

1. **Series I (1968–1973)**:
- During the Series I era, Jaguar kept things relatively straightforward. The trim levels weren't as diverse as today's options, but they still had their own distinct personalities.
- The primary trims for the Series I XJ6 included:
- **Standard**: The classic XJ6, elegant and refined. Walnut veneer, leather seats, and a sense of timeless luxury.
- **Daimler Sovereign**: Essentially an upmarket version of the XJ6, carrying the regal Daimler name. It added a touch more opulence and exclusivity.

2. **Series II (1973–1979)**:
- The Series II XJ6 continued the tradition, but with a few tweaks:
- **Standard**: Still the epitome of understated elegance.
- **Daimler Sovereign**: Because why mess with a winning formula? The Sovereign remained the sophisticated sibling.

3. **Series III (1979–1987)**:
- The '80s brought us the Series III XJ6, and guess what? More trim levels!
- **Standard**: Classic luxury, as always.
- **Daimler Sovereign**: Still there, still regal.
- **Vanden Plas**: A name that sounds like afternoon tea at Buckingham Palace. The Vanden Plas trim added extra plushness and exclusivity.

4. **XJ40 (1986–1994)**:
- The XJ40 generation embraced modernity, and with it came a broader range of trims:
- **L**: The entry-level trim—still dripping in British charm.
- **Sovereign**: A nod to tradition, with a touch of modern flair.
- **Daimler**: Because Daimler and luxury go together like scones and clotted cream.
- **Majestic**: The name says it all. Imagine cruising in the Majestic, feeling like you own a stately manor on wheels.

5. **X300 (1995–current)**:
- The X300 era blended classic elegance with contemporary sensibilities:
- **XJ6**: The heart and soul of the line-up, embodying the XJ6 legacy.
- **Sport**: For those who wanted a hint of athleticism with their luxury.
- **Vanden Plas**: Still here, still exclusive.
- **Super V8**: Because sometimes you need a supercharged V8 to conquer the motorway.

Now, fast-forward to the more recent XJ models (2010–2019):
- **Luxury**: The entry point, where comfort meets sophistication.
- **Premium Luxury**: A step up, with added features and plushness.
- **Portfolio**: For the discerning connoisseur who appreciates craftsmanship.
- **Autobiography**: The pinnacle of opulence, available only in long-wheelbase form.
- **R-Sport**: Sporty vibes without compromising on luxury.
- **XJR575**: When you want to unleash the beast within, limited to the standard-wheelbase version.
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Engines
1. **Series I (1968–1973)**:
- The Series I XJ6 came with a choice of three engines:
- **2.8-Litre Straight-Six**: A refined 2.8-litre straight-six engine from Jaguar's renowned XK family. It was like sipping Earl Grey tea—smooth, classic, and quintessentially British.
- **4.2-Litre Straight-Six**: The bigger sibling—a 4.2-litre straight-six. This engine had a touch more oomph, and it came in both carbureted and fuel-injected versions. Imagine it as the XJ6's eloquent poet, reciting verses of power and grace.
- **5.3-Litre V12**: The pièce de résistance! The V12 engine, available in the XJ6 from 1972 onward, was like having a symphony orchestra under the bonnet. It sang with 12 cylinders, each note resonating through the walnut-trimmed interior.

2. **Series II (1973–1979)**:
- The Series II XJ6 continued the legacy with similar engine options:
- The 4.2-litre straight-six remained, now with Lucas fuel injection (fancy, right?).
- The V12 still belted out its operatic tunes, captivating drivers and passengers alike.

3. **Series III (1979–1987)**:
- The Series III XJ6 strutted into the '80s with confidence:
- The 4.2-litre straight-six continued its reign, now universally injected.
- The V12 remained, because why mess with perfection?

4. **XJ40 (1986–1994)**:
- The XJ40 generation brought some fresh air (and engines):
- Variants of existing engines graced the scene:
- 3.0-Litre V6 (borrowed from the S-Type).
- 4.2-Litre V8 (because eight cylinders are better than six, right?).
- Supercharged versions for those who wanted a bit of lightning with their luxury.
- And a new 3.5-Litre V8 configuration, all paired with a 6-speed automatic transmission. It's like the XJ6 attended a tech conference and upgraded its power source.

5. **X300 (1995–current)**:
- The X300 era embraced modernity while nodding to tradition:
- The 3.2-Litre and 4.0-Litre straight-six engines took centre stage.
- The V12 gracefully exited the scene, leaving behind a legacy of grandeur.
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Performance
The performance of the Jaguar XJ6 2.8 litre and 4.2 litre models from 1968-1973 was quite impressive for their time:

### Jaguar XJ6 2.8 Litre
- **Engine**: 2.8-litre inline-6
- **Power**: 149 PS (147 bhp / 110 kW)
- **Torque**: 247 Nm (182 lb-ft)
- **Top Speed**: 185 km/h (115 mph)
- **0-60 mph**: Approximately 11.5 seconds

### Jaguar XJ6 4.2 Litre
- **Engine**: 4.2-litre inline-6
- **Power**: 205 PS (202 bhp / 151 kW)
- **Torque**: 314 Nm (231 lb-ft)
- **Top Speed**: 200 km/h (124 mph)
- **0-60 mph**: Approximately 9.8 seconds

These figures highlight the strong performance capabilities of the Jaguar XJ6 models during that era.
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Rivals
In 1968, the main rivals to the Jaguar XJ6 offered the following performance:

### Rover 3.5 Litre (P5B)
- **Engine**: 3.5-litre V8
- **Power**: 160 bhp
- **Top Speed**: 110 mph
- **0-60 mph**: Approximately 11.5 seconds

### Mercedes-Benz 280SE
- **Engine**: 2.8-litre inline-6
- **Power**: 160 bhp
- **Top Speed**: 118 mph
- **0-60 mph**: Approximately 10.5 seconds

### BMW 2500
- **Engine**: 2.5-litre inline-6
- **Power**: 150 bhp
- **Top Speed**: 115 mph
- **0-60 mph**: Approximately 11 seconds

### Daimler Sovereign
- **Engine**: 4.2-litre inline-6
- **Power**: 245 bhp
- **Top Speed**: 124 mph
- **0-60 mph**: Approximately 9.8 seconds

These performance figures highlight the competitive landscape of luxury sedans during that era.
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Designer/Dimensions
The Jaguar XJ6, introduced in 1968, was designed by Sir William Lyons, the founder of Jaguar Cars.

### Dimensions of the 1968 Jaguar XJ6:
- **Wheelbase**: 2,762 mm (108.75 in)
- **Length**: 4,813 mm (189.5 in)
- **Width**: 1,772 mm (69.75 in)
- **Height**: 1,340 mm (52.75 in)

These dimensions contributed to the car's elegant and spacious design, making it a standout luxury sedan of its time.
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Spares/Specialists NI
1. **Euro Car Parts (Mallusk, Northern Ireland)**:
- 📍 **Location**: 8 Trench Road, Mallusk, Newtownabbey BT36 4TY
- 📞 **Phone**: 028 9084 6020
- Euro Car Parts is like a well-stocked pantry for car aficionados. They offer an extensive collection of car parts, including those elusive Jaguar XJ6 bits. Imagine it as a secret chamber where Lucas gremlins and rust demons fear to tread.
- **Opening Hours**: Monday to Friday (8:00 AM to 6:00 PM), Saturday (8:00 AM to 4:00 PM). Sundays? Well, even Jaguars need a day off!
- [Learn more about Euro Car Parts](https://www.eurocarparts.com/mallusk.html)

2. **Moss Europe**:
- **Online Oasis**: Moss Europe is your digital oasis for classic car parts. They specialize in all things British, and their shelves are stocked with Jaguar XJ6 and XJ12 goodies.
- From body panels to engine components, they've got you covered. Fast shipping, easy returns, and thousands of parts—like a virtual garage where you can browse in your pyjamas.
- [Explore Moss Europe's Jaguar XJ6 & XJ12 Parts](https://www.moss-europe.co.uk/en-gb/vehicle/jaguar/xj6-xj12)

3. **PartsGateway**:
- **Sleuth Mode**: PartsGateway is your detective agency for car spares. They connect you with breakers and specialists across the UK. Imagine Sherlock Holmes with a socket wrench.
- Search, compare prices, read feedbacks, and unravel the mystery of finding quality XJ6 parts. Elementary, my dear Jaguar owner!
- [Investigate PartsGateway's Jaguar XJ6 Spares](https://www.partsgateway.co.uk/jaguar-parts/xj6)

4. **SC Parts**:
- 🇬🇧 **British Elegance**: SC Parts knows its Jaguars like a butler knows the silverware. They have a direct line to XJ6 spare parts, straight from stock.
- Imagine strolling through their virtual showroom, sipping tea, and choosing walnut veneer trim or a fresh set of spark plugs.
- [Browse SC Parts' Jaguar XJ6 Series I-III Spares](https://www.scparts.co.uk/en/jaguar/jaguar-xj6-series-i-iii-and-daimler-sovereign-series-i-iii-1968-1987/)
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Specialists NI
Here are a few options for locating a specialist mechanic who speaks fluent "Jaguarese":

1. **Andrew Lindsay Specialist Cars (Northern Ireland)**:
- **Location**: 2 Vestry Road, Ballygowan, Newtownards BT23 6HJ
- **Phone**: 028 9754 2979
- Andrew Lindsay is no ordinary mechanic; he's a well-respected independent Aston Martin and Jaguar specialist. With over 20 years of experience and factory training, he's the go-to person for your beloved Aston Martin or Jaguar. Imagine him in his workshop, surrounded by walnut veneer and the faint scent of British racing heritage. 🇬🇧
- [Learn more about Andrew Lindsay Specialist Cars](http://andrewlindsayspecialistcars.com/)

2. **Blakely Vehicle Services (Dromore, UK)**:
- **Location**: 46 Mullaghdrin Road E, Dromara BT25 2AQ
- **Phone**: 07779 014515
- Blakely Vehicle Services specializes in all things Jaguar. They're like the alchemists of Dromore, turning rusty bolts into polished gems. Whether it's repairs, diagnostics, or a friendly chat about XK engines, they've got you covered.
- [Explore Blakely Vehicle Services](https://blakelyvehicleservices.co.uk/)

3. **Stephen Groves Jaguar Specialist (Hillsborough)**:
- **Location**: 39C Old Coach Rd, Hillsborough BT26 6PB
- **Opening Hours**: Monday to Friday (8:30 AM to 5:30 PM)
- **Phone**: 028 9268 9006
- Stephen Groves is your Jaguar whisperer. His fully equipped workshop hums with the secrets of XK6 engines and the wisdom of classic Jaguars. Imagine him adjusting valve clearances while sipping a cup of Earl Grey.
- [Discover Stephen Groves Jaguar Specialist](https://www.stephen-groves.co.uk/)

4. **KWE Cars (Classic Jaguar Servicing)**:
- **Online Oasis**: KWE Cars offers specialist Jaguar servicing and repairs. They're like the digital keepers of the XK flame. Whether you own an XJS, XJ, E-Type, or even an Aston Martin DB7 (because variety is the spice of automotive life), they've got your back.
- Their service procedures go beyond the standard—think of it as a spa day for your XJ6. Engine tuning, rust protection, and LED dash illumination—it's all there.
- [Learn more about KWE Cars' Classic Jaguar Servicing](https://www.kwecars.com/jaguar-upgrade-restoration-services/classic-jaguar-servicing/)
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Racing
While the Jaguar XJ6 is better known for its luxurious cruising, it did dip its polished toes into the racing world, albeit with a certain elegance.

1. **Touring Car Championships**:
- In the 1970s and '80s, the Jaguar XJ6 made its presence felt in various touring car championships. Picture it: sleek saloons darting around racetracks, their walnut dashboards winking at the competition.
- The XJ6 competed against rivals like the BMW 3.0 CSL, Ford Capri, and Rover SD1. It was like a genteel tea party with a side of wheel-to-wheel combat.

2. **European Touring Car Championship (ETCC)**:
- The XJ6 cut a dashing figure in the ETCC. It wasn't about raw aggression; it was about poise and precision.
- Drivers like Tom Walkinshaw (yes, the same TWR legend) piloted XJ6s, showcasing their balance of power and grace.

3. **Bathurst 1000**:
- Down under in Australia, the Bathurst 1000 endurance race witnessed XJ6s prowling Mount Panorama.
- They weren't the loudest or fastest, but they had that unmistakable British charm. Imagine a cup of Earl Grey doing a lap—it'd be dignified yet spirited.

4. **Privateer Efforts**:
- Some passionate privateers—those knights of the garage—tweaked their XJ6s for local races. Triple carburettors, manual gearboxes, and a touch of magic.
- These cats weren't factory-backed, but they purred their way around circuits, leaving a trail of elegance.

5. **Kougar Kit Car**:
- Okay, this one's a bit cheeky. The Kougar sports car, based on the XJ6, emerged as a kit car. Imagine a sleek feline with DIY stripes.
- Fitted with a 4.2-litre XJ6 engine and triple carburettors, it danced between classic and custom. A true kit cat!
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Valuation
The value of a 1968 Jaguar XJ6 4.2 today can vary depending on its condition, mileage, and history. Based on recent listings, the average sale price for a well-maintained Jaguar XJ6 4.2 ranges from approximately £9,990 to £18,995.
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Clubs
There are Jaguar XJ6 owners clubs in Northern Ireland. You can check out the [Jaguar Enthusiasts' Club](https://jec.org.uk/regions/ni) which 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://www.jaguardriver.co.uk/areas/northern-ireland) in Northern Ireland welcomes all Jaguar owners and organizes various activities and social gatherings.
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