The Jaguar XJ Long (X351 facelift) 3.0 V6 Automatic, produced from 2015 to 2018, represents a significant refinement of Jaguar’s flagship sedan. This variant occupied a key position in the XJ lineup, offering a balance of performance, luxury, and technology. The X351 facelift brought updated styling, improved efficiency, and enhanced in-car technology to the XJ range, building upon the already successful foundation laid by the X350 and early X351 models. The “Long” designation indicates an extended wheelbase, providing increased rear passenger legroom, catering to buyers prioritizing comfort and prestige. This model was primarily aimed at the North American and Asian markets, where larger luxury sedans remain highly sought after.
Technical Specifications
| Brand | Jaguar |
| Model | XJ |
| Generation | XJ Long (X351 facelift 2015) |
| Type (Engine) | 3.0 V6 (340 Hp) Automatic |
| Start of production | 2015 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 9.1 l/100 km |
| Fuel consumption (US mpg) | 25.8 US mpg |
| Fuel consumption (UK mpg) | 31 UK mpg |
| Fuel consumption (km/l) | 11 km/l |
| CO2 emissions | 211 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.9 sec |
| Acceleration 0 – 62 mph | 5.9 sec |
| Acceleration 0 – 60 mph | 5.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 5.2 kg/Hp, 192.6 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 255 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 | 7.25 l (7.66 US qt | 6.38 UK qt) |
| Coolant | 8.6 l (9.09 US qt | 7.57 UK qt) |
| Kerb Weight | 1765 kg (3891.16 lbs.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 5255 mm (206.89 in.) |
| Width | 1899 mm (74.76 in.) |
| Width including mirrors | 2105 mm (82.87 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 3157 mm (124.29 in.) |
| Front track | 1626 mm (64.02 in.) |
| Rear track | 1604 mm (63.15 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 8 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
Powertrain & Engine Architecture
At the heart of the XJ Long 3.0 V6 Automatic lies Jaguar’s AJ306 engine, a 3.0-liter supercharged V6. This engine, part of the AJ-V6 family, utilizes a sixth-generation Eaton supercharger, providing near-instantaneous boost and a characteristic Jaguar power delivery. The engine employs direct fuel injection, optimizing combustion efficiency and contributing to its 340 horsepower output at 6,500 rpm and 450 Nm (331.9 lb-ft) of torque between 3,500 and 5,000 rpm. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, enhancing breathing and overall performance. The engine is longitudinally mounted in the front of the vehicle. The eight-speed automatic transmission, sourced from ZF, is a crucial component of this powertrain. Known for its smooth and responsive shifts, the ZF 8HP transmission contributes significantly to both performance and fuel economy. The transmission’s wide gear ratio spread allows for both strong acceleration and relaxed cruising.
Driving Characteristics
The 3.0 V6 Automatic powertrain delivers a refined and capable driving experience. While not as overtly sporty as the XJR with its supercharged V8, the V6 offers ample power for confident overtaking and highway cruising. The supercharger provides a strong mid-range punch, making the car feel responsive in everyday driving situations. The eight-speed transmission is well-tuned, providing seamless gear changes and contributing to a comfortable ride. Compared to the XJ’s diesel variants, the V6 offers a more immediate and engaging power delivery, albeit with slightly higher fuel consumption. The extended wheelbase of the Long variant enhances ride comfort, particularly for rear passengers, but can slightly diminish agility compared to the standard wheelbase XJ.
Equipment & Trim Levels
The XJ Long 3.0 V6 Automatic typically came well-equipped, reflecting its position as a luxury vehicle. Standard features included leather upholstery, heated and ventilated front seats, a premium sound system, a touchscreen infotainment system, and a comprehensive suite of safety features. The XJ Long often featured extended leather trim, rear seat entertainment options, and a panoramic sunroof as available upgrades. Trim levels varied by market, but generally included options for enhanced interior finishes, upgraded audio systems, and advanced driver-assistance technologies.
Chassis & Braking
The XJ Long utilizes an aluminum-intensive chassis, contributing to its relatively low weight for a full-size luxury sedan. The suspension system employs double wishbones at both the front and rear, providing a comfortable and controlled ride. The XJ Long 3.0 V6 Automatic is equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) is standard, enhancing safety and stability during emergency braking. The steering system is a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The Jaguar XJ Long 3.0 V6 Automatic was generally well-received by automotive critics. It was praised for its luxurious interior, comfortable ride, and refined powertrain. While some reviewers noted that the V6 engine lacked the outright performance of the V8-powered XJR, it was considered a suitable choice for buyers prioritizing comfort and efficiency. Fuel economy was competitive for its class, although not class-leading. Compared to rivals such as the BMW 7 Series and Mercedes-Benz S-Class, the XJ Long offered a unique blend of British style and driving dynamics.
Legacy
The Jaguar XJ Long 3.0 V6 Automatic has proven to be a relatively reliable vehicle, with the ZF 8HP transmission being particularly robust. The AJ306 engine, while requiring regular maintenance, is generally considered durable. In the used car market, these XJs represent a good value proposition, offering a significant amount of luxury and technology for the price. However, potential buyers should be aware of the potential for higher maintenance costs associated with a luxury vehicle of this age. The X351 facelift XJ, including the 3.0 V6 variant, remains a desirable choice for those seeking a sophisticated and comfortable luxury sedan with a touch of British flair.
