The Jaguar XJ (X351 facelift) 5.0 V8 Automatic, produced from 2015 to 2018, represents the culmination of the X351 generation, offering a blend of British luxury, performance, and technology. This variant, positioned as the flagship of the XJ lineup, featured a supercharged 5.0-liter V8 engine paired with an eight-speed automatic transmission. It served as Jaguar’s primary competitor to the long-wheelbase versions of the BMW 7 Series, Mercedes-Benz S-Class, and Audi A8, appealing to buyers seeking a sophisticated and powerful luxury sedan. The facelift brought subtle styling revisions, enhanced interior features, and updated infotainment systems, solidifying the XJ’s position in the premium segment.
Technical Specifications
| Brand | Jaguar |
| Model | XJ |
| Generation | XJ (X351 facelift 2015) |
| Type (Engine) | 5.0 V8 (510 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) | 11.1 l/100 km |
| Fuel consumption (US mpg) | 21.2 US mpg |
| Fuel consumption (UK mpg) | 25.4 UK mpg |
| Fuel consumption (km/l) | 9 km/l |
| CO2 emissions | 264 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.9 sec |
| Acceleration 0 – 62 mph | 4.9 sec |
| Acceleration 0 – 60 mph | 4.7 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 3.7 kg/Hp, 272 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 333.3 Nm/tonne |
| Power | 510 Hp @ 6000-6500 rpm |
| Power per litre | 102 Hp/l |
| Torque | 625 Nm @ 2500-5500 rpm (460.98 lb.-ft. @ 2500-5500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | 508PS |
| Engine displacement | 5000 cm3 (305.12 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.5 mm (3.64 in.) |
| Piston Stroke | 93 mm (3.66 in.) |
| Compression ratio | 9.5:1 |
| 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 capacity | 8.6 l (9.09 US qt | 7.57 UK qt) |
| Kerb Weight | 1875 kg (4133.67 lbs.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 5130 mm (201.97 in.) |
| Width | 1899 mm (74.76 in.) |
| Width including mirrors | 2105 mm (82.87 in.) |
| Height | 1460 mm (57.48 in.) |
| Wheelbase | 3032 mm (119.37 in.) |
| Front track | 1626 mm (64.02 in.) |
| Rear track | 1604 mm (63.15 in.) |
| Drivetrain | 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 5.0 V8 is Jaguar’s AJ126 engine, a 5.0-liter supercharged V8. This engine utilizes a sixth-generation Eaton supercharger, providing near-instantaneous boost and a characteristic Jaguar growl. The engine employs direct fuel injection, optimizing combustion efficiency and power delivery. The valvetrain is a dual overhead camshaft (DOHC) design with four valves per cylinder, contributing to the engine’s high volumetric efficiency. The engine code, 508PS, denotes its power output in metric horsepower. The eight-speed automatic transmission, sourced from ZF, is a crucial component of the powertrain. It offers smooth and responsive shifts, contributing to both performance and fuel economy. The transmission features a wide gear ratio spread, allowing for both strong acceleration and relaxed highway cruising.
Driving Characteristics
The 510 horsepower and 460 lb-ft of torque delivered by the 5.0 V8, coupled with the eight-speed automatic, result in exhilarating performance. Acceleration from 0 to 60 mph is achieved in approximately 4.7 seconds, and the car feels remarkably composed at high speeds. The automatic transmission is well-tuned, providing seamless gear changes in both normal and sport modes. While not as engaging as a manual transmission, the automatic offers a level of convenience and refinement that suits the XJ’s luxury character. Compared to the XJ’s supercharged 3.0-liter V6 models, the V8 offers significantly more power and torque, resulting in a more effortless driving experience. The V8 also provides a more distinctive exhaust note, enhancing the overall driving experience.
Equipment & Trim Levels
The XJ 5.0 V8 Automatic typically came equipped with a high level of standard features, befitting its flagship status. These included leather upholstery, heated and ventilated front seats with massage function, a premium sound system (often Meridian), a panoramic sunroof, and a comprehensive suite of driver-assistance technologies. Optional extras included rear-seat entertainment systems, executive rear seating packages with individual climate control and reclining seats, and various cosmetic enhancements. The interior trim could be customized with a range of wood veneers and metal accents. The XJ offered a sophisticated and luxurious cabin environment, emphasizing comfort and refinement.
Chassis & Braking
The XJ’s chassis is constructed primarily of aluminum, contributing to its relatively low weight for a full-size luxury sedan. The suspension utilizes a double wishbone configuration at both the front and rear, providing a comfortable ride and precise handling. Adaptive dampers were standard, allowing the driver to adjust the suspension stiffness to suit their preferences. The braking system features ventilated discs at all four corners, providing ample stopping power. Anti-lock brakes (ABS) and electronic stability control (ESC) are standard safety features. The XJ’s steering is electrically assisted, offering a balanced feel and responsive handling.
Market Reception & Comparison
The Jaguar XJ 5.0 V8 Automatic was generally well-received by automotive critics. It was praised for its powerful engine, luxurious interior, and refined driving experience. However, some critics noted that its fuel economy was relatively poor compared to its competitors, and its infotainment system lagged behind those offered by BMW and Mercedes-Benz. Compared to the XJ’s other engine options, the V8 offered the highest level of performance and prestige, but also came with a higher price tag and increased running costs. The V8 was targeted towards buyers who prioritized power and luxury over fuel efficiency.
Legacy
The Jaguar XJ (X351) 5.0 V8 Automatic remains a desirable used car, appreciated for its blend of luxury, performance, and British character. The supercharged V8 engine is generally considered reliable, although regular maintenance is essential. Common issues include oil leaks and occasional problems with the cooling system. The eight-speed automatic transmission has proven to be durable and reliable. While the XJ’s infotainment system may feel dated by today’s standards, its overall driving experience and luxurious interior continue to appeal to enthusiasts. The XJ 5.0 V8 represents a high point in Jaguar’s modern history, showcasing the brand’s commitment to building sophisticated and engaging luxury sedans.
