The Jaguar XJ X351 R 5.0 V8 Supercharged represents the pinnacle of performance within the X351 generation of the XJ luxury sedan, produced from 2013 to 2015. Positioned as the flagship model, the ‘R’ variant offered a substantial increase in power and dynamic capability compared to the standard XJ models. It aimed to compete directly with high-performance luxury sedans from German manufacturers like BMW and Mercedes-Benz, offering a blend of British luxury, sporting performance, and advanced technology. The X351 generation itself was a significant departure from its predecessors, utilizing an aluminum chassis to reduce weight and improve rigidity.
Technical Specifications
| Brand | Jaguar |
| Model | XJ |
| Generation | XJ (X351) |
| Type (Engine) | R 5.0 V8 Supercharged (550 Hp) Automatic |
| Start of production | 2013 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (NEDC) | 16.9 l/100 km (13.9 US mpg, 16.7 UK mpg, 5.9 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 8.6 l/100 km (27.4 US mpg, 32.8 UK mpg, 11.6 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 11.6 l/100 km (20.3 US mpg, 24.4 UK mpg, 8.6 km/l) |
| CO2 emissions (NEDC) | 270 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.6 sec |
| Acceleration 0 – 62 mph | 4.6 sec |
| Acceleration 0 – 60 mph | 4.4 sec |
| Maximum speed | 280 km/h (173.98 mph), Electronically limited |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 3.4 kg/Hp, 293.6 Hp/tonne |
| Weight-to-torque ratio | 2.8 kg/Nm, 363.1 Nm/tonne |
| Power | 550 Hp @ 6500 rpm |
| Power per litre | 110 Hp/l |
| Torque | 680 Nm @ 2500-5500 rpm (501.54 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 | 8.6 l (9.09 US qt, 7.57 UK qt) |
| Kerb Weight | 1873 kg (4129.26 lbs.) |
| Max. weight | 2400 kg (5291.09 lbs.) |
| Max load | 527 kg (1161.84 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 | 5127 mm (201.85 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 | 3032 mm (119.37 in.) |
| Front track | 1626 mm (64.02 in.) |
| Rear (Back) track | 1604 mm (63.15 in.) |
| Minimum turning circle | 11.9 m (39.04 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| 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 |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 265/35 R20, Rear wheel tires: 295/30 R20 |
| Wheel rims size | Front wheel rims: 9J x 20, Rear wheel rims: 10J x 20 |
Powertrain & Engine Architecture
At the heart of the XJ R is Jaguar’s 5.0-liter supercharged V8 engine, internally designated as the 508PS unit. This engine is a significant evolution of Jaguar’s long-standing V8 design, featuring a Roots-type supercharger with an intercooler to increase air density and boost power output. The engine utilizes direct fuel injection, optimizing combustion efficiency and contributing to its impressive power delivery. The valvetrain employs double overhead camshafts (DOHC) with four valves per cylinder, ensuring optimal gas flow. The engine produces 550 horsepower at 6,500 rpm and a substantial 680 Nm (501.54 lb-ft) of torque between 2,500 and 5,500 rpm. This power is channeled through an eight-speed automatic transmission, providing smooth and responsive gear changes. The transmission is calibrated for both performance and efficiency, with close gear ratios designed to maximize acceleration and maintain optimal engine speed during cruising.
Driving Characteristics
The XJ R delivers a markedly different driving experience compared to the naturally aspirated or diesel-powered XJ variants. The supercharged V8 provides effortless acceleration, with a 0-60 mph time of around 4.4 seconds. The eight-speed automatic transmission contributes to this performance, offering quick and precise shifts. While the XJ R is undeniably quick, it doesn’t sacrifice ride comfort. The air suspension system, standard on the R model, provides a smooth and controlled ride, even over uneven surfaces. The steering is precise and well-weighted, offering good feedback to the driver. Compared to the XJ Supercharged (which had a slightly less powerful version of the same engine), the ‘R’ model offered a more focused and aggressive driving experience. The XJ R’s performance was comparable to that of its rivals, such as the BMW 750i and Mercedes-Benz S550, but it often stood out for its more engaging driving dynamics.
Equipment & Trim Levels
The XJ R came standard with a comprehensive array of luxury features. Interior appointments included premium leather upholstery, wood veneer trim, and heated and ventilated front seats with massage function. Standard technology included a touchscreen infotainment system, a premium sound system, and a suite of driver-assistance features such as adaptive cruise control, blind-spot monitoring, and lane departure warning. Optional extras included a rear-seat entertainment system, upgraded leather options, and various cosmetic enhancements. The R trim was distinguished by its unique exterior styling cues, including a more aggressive front bumper, side skirts, and a rear spoiler.
Chassis & Braking
The XJ R benefited from the X351’s lightweight aluminum chassis, which provided a solid foundation for its performance capabilities. The suspension system featured coil springs, double wishbones at the front, and an independent multi-link setup at the rear, complemented by air suspension for adjustable ride height and damping. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The XJ R also featured an advanced anti-lock braking system (ABS) and electronic stability control (ESC) to enhance safety and control.
Market Reception & Comparison
The XJ R was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and refined driving experience. However, some reviewers noted that its fuel economy was relatively poor, reflecting the demands of the supercharged V8 engine. Compared to other XJ trims, the R model commanded a significant price premium, but it offered a substantial increase in performance and exclusivity. Against its German rivals, the XJ R was often seen as a more stylish and characterful alternative, but it sometimes lagged behind in terms of cutting-edge technology.
Legacy
The Jaguar XJ X351 R 5.0 V8 Supercharged remains a desirable luxury sedan in the used car market. The 5.0-liter supercharged V8 engine has proven to be relatively reliable, although regular maintenance is essential. The aluminum chassis has also held up well over time, minimizing corrosion issues. While the XJ R’s fuel economy is not its strong suit, its combination of performance, luxury, and British charm continues to appeal to enthusiasts and collectors. It represents a high point in Jaguar’s modern history, showcasing the brand’s ability to create truly exceptional luxury performance vehicles.
