The Jaguar XJS Coupe 4.0, produced between 1994 and 1996, represented a significant evolution in the long-running XJS series. Positioned as a higher-performance variant within the XJS lineup, it offered a substantial upgrade over the earlier 3.6-liter and 2.9-liter models. This iteration of the XJS, built on the platform code XJ-S, aimed to blend British luxury with respectable performance, appealing to buyers seeking a grand touring experience. The 4.0-liter engine, coupled with a four-speed automatic transmission, became the flagship powertrain for the final years of XJS production, solidifying its place as a desirable classic.
Technical Specifications
| Brand | Jaguar |
| Model | XJS |
| Generation | XJS Coupe |
| Type (Engine) | 4.0 (233 Hp) Automatic |
| Start of production | 1994 |
| End of production | 1996 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (combined) | 10.7 l/100 km |
| Fuel consumption (US mpg) | 22 |
| Fuel consumption (UK mpg) | 26.4 |
| Fuel consumption (km/l) | 9.3 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.7 sec |
| Acceleration 0 – 62 mph | 7.7 sec |
| Acceleration 0 – 60 mph | 7.3 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Weight-to-power ratio | 7.3 kg/Hp |
| Weight-to-torque ratio | 4.7 kg/Nm |
| Power | 233 Hp @ 4700 rpm |
| Power per litre | 58.5 Hp/l |
| Torque | 366 Nm @ 4000 rpm (269.95 lb.-ft. @ 4000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 3980 cm3 (242.87 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 91 mm (3.58 in.) |
| Piston Stroke | 102 mm (4.02 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated |
| Valvetrain | DOHC |
| Kerb Weight | 1705 kg (3758.88 lbs.) |
| Max. weight | 2055 kg (4530.5 lbs.) |
| Max load | 350 kg (771.62 lbs.) |
| Trunk (boot) space – minimum | 407 l (14.37 cu. ft.) |
| Fuel tank capacity | 89 l (23.51 US gal | 19.58 UK gal) |
| Length | 4820 mm (189.76 in.) |
| Width | 1793 mm (70.59 in.) |
| Height | 1254 mm (49.37 in.) |
| Wheelbase | 2588 mm (101.89 in.) |
| Front track | 1489 mm (58.62 in.) |
| Rear (Back) track | 1504 mm (59.21 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 4 |
| Gearbox type | Automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system), Hydraulic Steering |
| Tires size | 225/55 ZR16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The heart of the XJS 4.0 was the AJ6 inline-six engine, a 3,980cc (242.87 cubic inch) unit. This engine represented a significant departure from the earlier Jaguar six-cylinder designs, featuring a more modern architecture with a DOHC (Double Overhead Camshaft) valvetrain and multi-port fuel injection. The engine produced 233 horsepower at 4,700 rpm and 366 Nm (269.95 lb-ft) of torque at 4,000 rpm. The 10:1 compression ratio contributed to its responsive nature. The engine’s inline configuration, while less common in high-performance cars of the era, provided a smooth and refined power delivery. Paired with the engine was a four-speed automatic transmission, offering convenient operation for grand touring. This transmission, while not known for its sportiness, was reliable and well-suited to the XJS’s intended character.
Driving Characteristics
The XJS 4.0 Automatic offered a distinctly different driving experience compared to the manual transmission or lower-powered versions. The automatic transmission prioritized smooth shifts and ease of use over outright performance. Acceleration from 0-60 mph took approximately 7.3 seconds, respectable for the early 1990s, but noticeably slower than the manual variants. The automatic’s gear ratios were geared towards comfortable cruising, making it an excellent highway car. While it lacked the engaging feel of a manual gearbox, the 4.0-liter engine provided ample power for overtaking and maintaining high speeds. The car felt planted and stable, thanks to its relatively heavy weight and well-tuned suspension.
Equipment & Trim Levels
The XJS 4.0 Automatic typically came well-equipped, reflecting its position as the top-of-the-line XJS model. Standard features included leather upholstery, power-adjustable front seats, air conditioning, and a premium sound system. Wood veneer trim adorned the interior, enhancing the luxurious ambiance. Optional extras included a sunroof, upgraded sound systems, and various exterior color choices. The interior layout was classic Jaguar, emphasizing comfort and elegance. The dashboard featured a comprehensive array of gauges, providing the driver with essential information.
Chassis & Braking
The XJS 4.0 utilized a robust chassis with double wishbone suspension at both the front and rear. This suspension setup provided a comfortable ride while maintaining good handling characteristics. Ventilated disc brakes were fitted to the front wheels, while the rear wheels featured solid discs. Anti-lock braking system (ABS) was standard, enhancing safety and control. The steering was hydraulically assisted, providing a light and responsive feel. The car’s weight (approximately 1,705 kg or 3,758.88 lbs) contributed to its stability, but also impacted its agility compared to lighter sports cars.
Market Reception & Comparison
Critics generally praised the XJS 4.0 for its refined engine, comfortable ride, and luxurious interior. However, the automatic transmission received some criticism for its lack of responsiveness. Compared to the 3.6-liter and 2.9-liter XJS models, the 4.0 offered a significant performance boost. Fuel economy, at 10.7 l/100 km (22 US mpg), was typical for a grand touring car of its era. The 4.0-liter engine was also considered more reliable than some of the earlier Jaguar engines, although maintenance costs remained relatively high due to the car’s complexity and British origins.
Legacy
The Jaguar XJS 4.0 Automatic holds a respected position among classic Jaguar enthusiasts. The AJ6 engine, when properly maintained, is known for its durability. However, like all classic Jaguars, it requires diligent care to prevent issues related to age and corrosion. Today, the XJS 4.0 is a sought-after model in the used car market, particularly examples in good condition with a well-documented service history. Its blend of British luxury, respectable performance, and classic styling continues to appeal to collectors and enthusiasts alike. The car represents the culmination of the XJS design, offering a refined and enjoyable grand touring experience.
