The Jaguar XK Coupe (X100) 4.0 V8 Automatic, produced between 1996 and 2002, represented a significant return to form for Jaguar, blending classic styling with modern engineering. This variant occupied a mid-range position within the X100 lineup, offering a compelling balance of performance and luxury. It served as a direct replacement for the XJS, aiming to recapture the spirit of the original E-Type while providing contemporary comfort and technology. The X100 platform, also underpinning the XK8 convertible, was a crucial model for Jaguar, helping to revitalize the brand’s image and sales in the late 1990s.
Technical Specifications
| Brand | Jaguar |
| Model | XK |
| Generation | XK Coupe (X100) |
| Type (Engine) | 4.0 V8 (284 Hp) Automatic |
| Start of production | 1996 |
| End of production | 2002 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 17.2 l/100 km (13.7 US mpg, 16.4 UK mpg, 5.8 km/l) |
| Fuel consumption (economy) – extra urban | 8.6 l/100 km (27.4 US mpg, 32.8 UK mpg, 11.6 km/l) |
| Fuel consumption (economy) – combined | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 6.3 kg/Hp, 159.6 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 210.7 Nm/tonne |
| Power | 284 Hp @ 6100 rpm |
| Power per litre | 71.1 Hp/l |
| Torque | 375 Nm @ 4250 rpm (276.59 lb.-ft. @ 4250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | AJ26, AJ27 |
| Engine displacement | 3996 cm3 (243.85 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1780 kg (3924.23 lbs.) |
| Max. weight | 2100 kg (4629.71 lbs.) |
| Max load | 320 kg (705.48 lbs.) |
| Trunk (boot) space – minimum | 327 l (11.55 cu. ft.) |
| Fuel tank capacity | 75 l (19.81 US gal | 16.5 UK gal) |
| Length | 4760 mm (187.4 in.) |
| Width | 1829 mm (72.01 in.) |
| Height | 1306 mm (51.42 in.) |
| Wheelbase | 2588 mm (101.89 in.) |
| Front track | 1504 mm (59.21 in.) |
| Rear (Back) track | 1498 mm (58.98 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| 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 | 245/50 R17 |
Powertrain & Engine Architecture
The heart of the XK 4.0 is Jaguar’s AJ26/AJ27 4.0-liter V8 engine. This naturally aspirated engine, a significant departure from Jaguar’s previous inline-six designs, featured a 60-degree V-angle and all-aluminum construction. The engine utilized multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The AJ26 and AJ27 codes denote slight variations in engine management systems and emissions control equipment. The 4.0L V8 produced 284 horsepower at 6,100 rpm and 375 lb-ft of torque at 4,250 rpm. This power was delivered to the rear wheels through a five-speed automatic transmission, a crucial component of this particular variant. The transmission was designed for smooth shifts and comfortable cruising, prioritizing refinement over outright performance.
Driving Characteristics
The XK 4.0 Automatic offered a grand touring experience, emphasizing comfort and effortless cruising. While not as overtly sporty as manual transmission versions or the later supercharged models, the 4.0L V8 provided ample power for confident overtaking and highway driving. The automatic transmission, while smooth, did result in some power loss compared to the manual, and gear changes weren’t particularly quick or responsive by modern standards. The gear ratios were tuned for relaxed cruising, with a focus on maximizing fuel efficiency (relatively speaking for a V8) rather than aggressive acceleration. The car felt substantial and planted on the road, offering a secure and stable driving experience.
Equipment & Trim Levels
The XK 4.0 Automatic came standard with a generous level of equipment, befitting its luxury positioning. Standard features included leather upholstery, power-adjustable front seats, climate control, a premium sound system, and alloy wheels. Optional extras included a navigation system, upgraded leather trim, wood veneer interior accents, and a sunroof. The interior design was classic Jaguar, with a focus on wood and leather, creating a warm and inviting atmosphere. The dashboard layout was relatively straightforward, with clearly labeled controls and a traditional instrument cluster.
Chassis & Braking
The X100 chassis was a significant improvement over the XJS, utilizing a more rigid monocoque construction. Suspension consisted of independent double wishbones at both the front and rear, providing a comfortable ride and good handling characteristics. The XK 4.0 featured ventilated disc brakes on all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) was standard, enhancing safety and stability during hard braking. The steering was rack and pinion with hydraulic power assistance, offering a balanced feel and precise control.
Market Reception & Comparison
The XK 4.0 Automatic was generally well-received by critics, who praised its elegant styling, comfortable ride, and refined powertrain. However, some reviewers noted that the automatic transmission dulled the engine’s performance somewhat, and that the car wasn’t as engaging to drive as some of its rivals. Compared to the manual transmission XK 4.0, the automatic version offered slightly slower acceleration and reduced fuel economy. The supercharged XK8, introduced later, provided a significant performance upgrade but at a higher price point. The 4.0L Automatic appealed to buyers who prioritized comfort and luxury over outright sportiness.
Legacy
The Jaguar XK 4.0 V8 Automatic has proven to be a relatively reliable classic in the used car market. The AJ26/AJ27 engine is known for its durability, although regular maintenance is essential. Common issues include oil leaks, cooling system problems, and occasional electrical gremlins. The automatic transmission, while generally robust, can require attention as it ages. Today, the XK 4.0 Automatic represents an affordable entry point into Jaguar ownership, offering a stylish and comfortable grand touring experience. Its classic design and refined powertrain continue to appeal to enthusiasts seeking a taste of British luxury.
