The Jaguar XJ Long (X351) 3.0 V6 Supercharged AWD Automatic, produced from 2012 to 2015, represents a significant iteration of Jaguar’s flagship sedan. Positioned as a high-performance, luxury variant within the XJ range, it combined the extended wheelbase of the ‘Long’ body style with a potent supercharged V6 engine and all-wheel drive capability. This model aimed to deliver a refined driving experience coupled with impressive acceleration and all-weather confidence, primarily targeting buyers in markets where luxury sedans with performance and all-season capability were highly valued, including North America, Europe, and parts of Asia. It sat near the top of the XJ lineup, below only the supercharged V8 models in terms of outright performance.
Technical Specifications
| Brand | Jaguar |
| Model | XJ |
| Generation | XJ Long (X351) |
| Type (Engine) | 3.0 V6 Supercharged (340 Hp) AWD Automatic |
| Start of production | 2012 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 14.4 l/100 km (16.3 US mpg, 19.6 UK mpg, 6.9 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 7.8 l/100 km (30.2 US mpg, 36.2 UK mpg, 12.8 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 9.9 l/100 km (23.8 US mpg, 28.5 UK mpg, 10.1 km/l) |
| CO2 emissions (NEDC) | 234 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.4 sec |
| Acceleration 0 – 62 mph | 6.4 sec |
| Acceleration 0 – 60 mph | 6.1 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 5.5 kg/Hp, 180.6 Hp/tonne |
| Weight-to-torque ratio | 4.2 kg/Nm, 239 Nm/tonne |
| Power | 340 Hp @ 6500 rpm |
| Power per litre | 113.5 Hp/l |
| Torque | 450 Nm @ 3500-5000 rpm (331.9 lb.-ft. @ 3500-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | 306PS |
| Engine displacement | 2995 cm3 (182.77 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 84.5 mm (3.33 in.) |
| Piston Stroke | 89 mm (3.5 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 8.6 l (9.09 US qt | 7.57 UK qt) |
| Kerb Weight | 1883 kg (4151.3 lbs.) |
| Max. weight | 2450 kg (5401.33 lbs.) |
| Max load | 567 kg (1250.02 lbs.) |
| Trunk (boot) space – minimum | 520 l (18.36 cu. ft.) |
| Fuel tank capacity | 82 l (21.66 US gal | 18.04 UK gal) |
| Length | 5252 mm (206.77 in.) |
| Width | 1899 mm (74.76 in.) |
| Width with mirrors folded | 1950 mm (76.77 in.) |
| Width including mirrors | 2105 mm (82.87 in.) |
| Height | 1457 mm (57.36 in.) |
| Wheelbase | 3157 mm (124.29 in.) |
| Front track | 1626 mm (64.02 in.) |
| Rear (Back) track | 1604 mm (63.15 in.) |
| Minimum turning circle (turning diameter) | 12.9 m (42.32 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 8 gears, automatic transmission |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 355 mm |
| Rear brakes | Ventilated discs, 326 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/45 R19; 245/40 R20Rear wheel tires: 275/40 R19; 275/35 R20 |
| Wheel rims size | Front wheel rims: 9J x 19; 9J x 20Rear wheel rims: 10J x 19; 10J x 20 |
Powertrain & Engine Architecture
At the heart of the XJ Long 3.0 V6 Supercharged is Jaguar’s AJ-V6 engine, specifically the 306PS variant. This 2.995-liter (182.77 cubic inch) V6 utilizes a Roots-type supercharger, providing instant boost and a broad torque curve. Direct fuel injection is employed for precise fuel delivery and improved efficiency. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing breathing and contributing to its 340 horsepower output at 6500 rpm and 450 Nm (331.9 lb-ft) of torque between 3500 and 5000 rpm. The engine is longitudinally mounted in the front of the vehicle. The engine is paired with an eight-speed automatic transmission, providing smooth and responsive gear changes. This transmission was sourced from ZF and is known for its efficiency and refinement.
Driving Characteristics
The 3.0 V6 Supercharged AWD configuration delivers a compelling blend of performance and comfort. Acceleration to 60 mph takes approximately 6.1 seconds, and the electronically limited top speed is 155.34 mph. The supercharger provides immediate throttle response, making the car feel lively and engaging. The all-wheel-drive system enhances traction, particularly in inclement weather, providing a surefooted feel. Compared to the naturally aspirated V6 models, the supercharged version offers a significant performance upgrade. While not as brutally fast as the supercharged V8 variants, it provides ample power for everyday driving and spirited excursions. The eight-speed automatic transmission contributes to a relaxed cruising experience, with well-chosen gear ratios that keep the engine in its optimal power band.
Equipment & Trim Levels
The XJ Long 3.0 V6 Supercharged AWD Automatic came generously equipped as standard. Interior features typically included leather upholstery, wood veneer trim, heated and ventilated front seats with massage function, a premium sound system, and a touchscreen infotainment system. Standard safety features included a suite of airbags, ABS, traction control, and stability control. Optional extras included rear-seat entertainment, upgraded leather options, and various driver-assistance systems. The ‘Long’ wheelbase provided significantly more rear legroom compared to the standard-wheelbase XJ, making it particularly appealing to chauffeur-driven buyers or those prioritizing rear passenger comfort.
Chassis & Braking
The XJ Long utilizes an aluminum-intensive chassis, contributing to its relatively low weight for a full-size luxury sedan. The front suspension features a double wishbone setup with coil springs and a transverse stabilizer bar, while the rear suspension employs an independent multi-link design with air suspension and a transverse stabilizer bar. The air suspension provides a smooth and comfortable ride, automatically adjusting to road conditions. Braking duties are handled by ventilated discs on all four wheels, with larger discs at the front (355mm) compared to the rear (326mm). An anti-lock braking system (ABS) is standard.
Market Reception & Comparison
The Jaguar XJ Long 3.0 V6 Supercharged AWD Automatic was generally well-received by automotive critics. It was praised for its luxurious interior, comfortable ride, and strong performance. Fuel economy, while not exceptional at 23.8 US mpg combined, was considered reasonable for a vehicle of its size and performance. Compared to its rivals, such as the BMW 7 Series and Mercedes-Benz S-Class, the XJ offered a more sporting driving experience and a distinctive British character. However, some critics noted that the infotainment system could be less intuitive than those offered by its German competitors. Reliability was generally good, although some owners reported minor electrical issues.
Legacy
The Jaguar XJ Long 3.0 V6 Supercharged AWD Automatic remains a desirable used car today. The AJ-V6 engine, while requiring regular maintenance, is generally considered reliable when properly cared for. The eight-speed automatic transmission has also proven to be durable. The XJ’s aluminum construction helps to mitigate corrosion, and the availability of parts is generally good. These vehicles offer a compelling combination of luxury, performance, and value on the used market, appealing to buyers seeking a sophisticated and capable grand tourer.
