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The Jaguar AJ-V8 is a compact V8 piston engine used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. It is a DOHC design and replaced the Jaguar AJ6 engine in many cars. It is available in displacements ranging from 3.2 L to 5.0 L, and a supercharged version is also produced. Ford Motor Company uses this small V8 in other products as well, including the Lincoln LS and Land Rovers.
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 liners and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since.
The engine uses a two-state Variable Valve Timing system to switch the intake cam timing by 30°. Newer engines use a more sophisticated system which can vary intake timing incrementally up to 48°.
The 4.0 liter engine was introduced in 1996. It has a square 86 mm bore and stroke. The Jaguar S-Type (281 hp, 287 ft.lb)
The supercharged 4.0 L AJ-V8 is used in the high-performance R versions of Jaguar's cars. It produces 370 hp (276 kW) and 525 Nm.
Vehicles using the supercharged version include:
The 3.2 liter variant was the second to be introduced. It reduces the stroke to 70 mm and power falls to 179 kW and 316 Nm.
Vehicles using this engine:
Vehicles using this engine:
The 3.9 liter variant produced 280 hp and 286 ft.lb in the 2003 Lincoln LS.
Vehicles using this engine:
The 4.2 liter version features a longer stroke. It was introduced in 2003 and produces 300 hp (220 kW).
Vehicles using this engine:
The 4.2 SC is a supercharged variant of the 4.2. It was introduced in 2003 to replace the 4.0 SC and produces 400 hp (300 kW).
Vehicles using this engine:
Vehicles using the supercharged version of this engine:
The 4.4 L version features a 2 mm wider bore over the 4.0 to increase torque. Aston Martin developed a special version of the engine with Aston Martin AMV8 (400 hp)
A special 5.0 liter racing engine was produced with 550 hp, though no road car uses this engine.
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| Jaguar XJ| Jaguar S-Type | Jaguar X-Type | Jaguar XK8
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| Jaguar XK120 | Jaguar XK140 | Jaguar XK150 | Jaguar C-Type | Jaguar D-type | Jaguar XKSS | Jaguar Mark 2 | Jaguar S-type (1964) | Jaguar Mark VII | Jaguar E-type | Jaguar XJS | Jaguar XJ220 | Jaguar XJR15 | Jaguar Mark X
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| Jaguar AJ-V8 engine | Jaguar AJ-V6 engine | Jaguar XK6 engine | Jaguar V12 engine | Jaguar AJ6 engine
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