The Jaguar XK R Coupe (X150), produced between 2006 and 2009, represented the high-performance variant of the second-generation XK. Positioned as the flagship coupe within the X150 range, it offered a significant step up in power and handling compared to the standard XK models. Built upon Jaguar’s aluminum monocoque chassis, the X150 aimed to blend traditional British luxury with modern performance. The ‘R’ designation signified a commitment to sporting dynamics, appealing to drivers seeking a grand tourer with genuine performance credentials. This particular iteration, equipped with the 4.2-liter supercharged V8 and a six-speed automatic transmission, was a key component of Jaguar’s revitalization strategy during this period.
Technical Specifications
| Brand | Jaguar |
| Model | XK |
| Generation | XK Coupe (X150) |
| Type (Engine) | R 4.2 V8 (416 Hp) Automatic |
| Start of production | 2006 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 19.1 l/100 km (12.3 US mpg, 14.8 UK mpg, 5.2 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) | 12.3 l/100 km (19.1 US mpg, 23 UK mpg, 8.1 km/l) |
| CO2 emissions (NEDC) | 294 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 4.1 kg/Hp, 245.4 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 330.4 Nm/tonne |
| Power | 416 Hp @ 6250 rpm |
| Power per litre | 99.1 Hp/l |
| Torque | 560 Nm @ 4000 rpm (413.03 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AJ34S |
| Engine displacement | 4196 cm3 (256.06 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 90.3 mm (3.56 in.) |
| Compression ratio | 9.1:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Supercharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 7 l (7.4 US qt | 6.16 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1695 kg (3736.84 lbs.) |
| Max. weight | 2080 kg (4585.62 lbs.) |
| Max load | 385 kg (848.78 lbs.) |
| Trunk (boot) space – minimum | 300 l (10.59 cu. ft.) |
| Fuel tank capacity | 71.1 l (18.78 US gal | 15.64 UK gal) |
| Length | 4791 mm (188.62 in.) |
| Width with mirrors folded | 1892 mm (74.49 in.) |
| Width including mirrors | 2070 mm (81.5 in.) |
| Height | 1322 mm (52.05 in.) |
| Wheelbase | 2752 mm (108.35 in.) |
| Ride height (ground clearance) | 120 mm (4.72 in.) |
| Minimum turning circle (turning diameter) | 10.97 m (35.99 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission |
| Front suspension | Double wishbone, Transverse stabilizer |
| Rear suspension | Double wishbone, Transverse stabilizer |
| Front brakes | Ventilated discs, 400 mm |
| Rear brakes | Ventilated discs, 350 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Front wheel tires | 245/40 R19; 255/35 R20 |
| Rear wheel tires | 275/35 R19; 285/30 R20 |
| Front wheel rims | 8.5J x 19; 9J x 20 |
| Rear wheel rims | 9.5J x 19; 9.5J x 20 |
Powertrain & Engine Architecture
The heart of the XK R was the 4.2-liter AJ34S V8 engine. This engine featured a Roots-type supercharger, providing forced induction to significantly boost power output. The supercharger, coupled with an intercooler, helped manage intake air temperature, maximizing efficiency and preventing knock. Fuel delivery was handled by a multi-port fuel injection system, ensuring precise fuel metering. The engine utilized a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing airflow for increased performance. The six-speed automatic transmission, sourced from ZF, was specifically calibrated to handle the engine’s substantial torque. This transmission featured a torque converter and offered a manual shift mode for greater driver control. The transmission’s gear ratios were tuned to provide a balance between acceleration and cruising efficiency.
Driving Characteristics
The XK R with the 4.2-liter supercharged V8 and automatic transmission delivered a distinctly sporting driving experience. Acceleration was brisk, with 0-60 mph times consistently around 4.9 seconds. The automatic transmission, while smooth, could feel slightly less responsive than the available manual option. However, the transmission’s ability to seamlessly shift through the gears contributed to a refined grand touring experience. The supercharger provided immediate throttle response, delivering a surge of power across the rev range. The car felt planted and stable at high speeds, thanks to its aluminum chassis and well-tuned suspension. While not as overtly aggressive as some contemporary sports cars, the XK R offered a compelling blend of performance and comfort.
Equipment & Trim Levels
The XK R came standard with a generous array of features, reflecting its position as the range-topping model. Interior appointments included leather upholstery, wood veneer trim, and power-adjustable seats. Standard equipment also included a premium sound system, automatic climate control, and bi-xenon headlights. Optional extras included a navigation system, heated seats, and upgraded leather options. The XK R’s interior was designed to provide a luxurious and comfortable environment for both driver and passengers.
Chassis & Braking
The X150 XK R benefited from Jaguar’s advanced aluminum monocoque chassis, providing a lightweight and rigid platform. The suspension system consisted of double wishbones at both the front and rear, with a transverse stabilizer bar to reduce body roll. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The front brakes measured 400mm in diameter, while the rear brakes were 350mm. An anti-lock braking system (ABS) was standard, enhancing safety and control. The steering system utilized a rack and pinion setup with hydraulic power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The XK R was generally well-received by automotive critics, who praised its performance, handling, and luxurious interior. However, some reviewers noted that the automatic transmission could feel slightly less engaging than the manual option. Compared to the standard XK models, the R offered a significant performance upgrade, justifying its higher price tag. Against competitors such as the BMW 6 Series and Mercedes-Benz CL, the XK R offered a unique blend of British style and performance. Fuel economy, at around 19 mpg combined, was typical for a high-performance grand tourer of its era. Reliability was generally good, although preventative maintenance was crucial to ensure the longevity of the supercharged engine.
Legacy
The Jaguar XK R (X150) remains a desirable grand tourer in the used car market. The 4.2-liter supercharged V8 engine is known for its robust construction and strong performance, but requires regular maintenance, including oil changes and supercharger belt inspections. The ZF six-speed automatic transmission is also generally reliable, provided it is serviced according to Jaguar’s recommendations. The XK R’s combination of performance, luxury, and distinctive styling has ensured its enduring appeal among enthusiasts. It represents a high point in Jaguar’s modern history, showcasing the brand’s commitment to building exciting and engaging automobiles.
