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| Jaguar AJ8 | |
|---|---|
 | |
| Overview | |
| Manufacturer | 1996–2012 Jaguar Cars 2013–present Jaguar Land Rover |
| Production | 1996–present 2013–2020 (Jaguar AJ6) |
| Layout | |
| Configuration | 90° V8 90° V6 |
| Displacement | 3.0 L (2,995 cc) (V6) 3.5 L (3,473 cc) 3.9 L (3,934 cc) 4.0 L (3,996 cc) 4.2 L (4,196 cc) 4.3 L (4,280 cc) 4.4 L (4,394 cc) 4.7 L (4,735 cc) 5.0 L (5,000 cc) |
| Cylinder bore | 84.5 mm (3.33 in) (V6) 86 mm (3.39 in) 88 mm (3.46 in) 89 mm (3.5 in) 91 mm (3.58 in) 92.5 mm (3.64 in) |
| Piston stroke | 86 mm (3.39 in) 70 mm (2.76 in) 76.5 mm (3.01 in) 85 mm (3.35 in) 89 mm (3.5 in) (V6) 90.3 mm (3.56 in) 91 mm (3.58 in) 93 mm (3.66 in) |
| Cylinder block material | Aluminum alloy |
| Cylinder head material | Aluminum alloy |
| Valvetrain | DOHC 4 valves x cyl. with VVT |
| Compression ratio | 10.5:1 |
| Combustion | |
| Supercharger | TVS with intercooler (on some versions) |
| Fuel system | Direct injection |
| Management | Bosch |
| Fuel type | Petrol |
| Cooling system | Water-cooled |
| Output | |
| Power output | 240–592 hp (179–441 kW; 243–600 PS) |
| Torque output | 233–561 lb⋅ft (316–761 N⋅m) |
| Chronology | |
| Predecessor | Jaguar AJ16 Jaguar V12 Rover V8 BMW M62 |
| Successor | Ingenium AJ300 BMW N63 (Range Rover) |
The Jaguar AJ-8 is a compact DOHC V8 piston engine used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. It was an in house design with work beginning before Ford's purchase of the company. In 1997 it replaced both designs previously available on Jaguar cars: the straight-6 Jaguar AJ6 engine (or rather its AJ16 variant), and the Jaguar V12 engine. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the Jaguar AJ-V6 engine was added to the list. The AJ-V8 is available in displacements ranging from 3.2L to 5.0L, and a supercharged version is also produced. Ford Motor Company also used this engine in other cars, including the Lincoln LS and the 2002–2005 Ford Thunderbird, as well as in several Land Rovers, and the Aston Martin V8 Vantage.
The AJ-V8 was designed to use Nikasil-coated cylinders rather than the more-common iron cylinder liners. However, like the BMW M60, high-sulphur fuel reacted with the Nikasil coating and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since.
The engine originally used a two-state Variable Valve Timing system to switch the intake cam timing by 30°. Newer variants use a more sophisticated system which can vary intake timing incrementally up to 48°. The Lincoln version was made in the United States.
Other engine features include fracture-split forged powder metal connecting rods, a special one-piece cast camshaft, and reinforced plastic intake manifold.
The AJ-V8 was on the Ward's 10 Best Engines list for 2000.
Ford ceased production of the AJ-V8 engine in September 2020 when it closed the Bridgend Plant.[1] However, in August 2020 JLR was able to take over production means for the AJ-V8.[2]
- ^ Jolly, Jasper (6 June 2019). "Ford to close Bridgend factory by September 2020". The Guardian. ISSN 0261-3077. Retrieved 11 March 2020.
- ^ "Jaguar Land Rover to continue AJ V8 production in-house". Autocar. Retrieved 28 December 2020.