Jaguar AJ-V engine

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°.

Contents

4.0

The 4.0 liter engine was introduced in 1996. It has a square 86 mm bore and stroke. The normally-aspirated version produces 290 hp in the 2004 XK8.

Vehicles using this engine:

4.0 SC

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:

3.2

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:

Jaguar XJ (non-US)

3.5

Vehicles using this engine:

Land Rover Range Rover (260hp)

3.9

The 3.9 liter variant produced 280 hp and 286 ft.lb in the 2003 Lincoln LS.

Vehicles using this engine:

2000-2002 Lincoln LS, 252 hp
2003-2004 Lincoln LS, 280 hp
2002-2004 Ford Thunderbird, 252 hp 267 ft.lb

4.2

The 4.2 liter version features a longer stroke. It was introduced in 2003 and produces 300 hp (220 kW).

Vehicles using this engine:

2003 Jaguar XK8 (294 hp, 303 ft.lb)
2003 Jaguar S-Type 4.2

4.2 SC

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:

2003 Jaguar XKR
2003 Jaguar S-Type R

4.3

Vehicles using the supercharged version of this engine:

Land Rover Range Rover (400 hp)

4.4

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 dry-sump lubrication and many other modifications.

Vehicles using a 4.0 L AJ-V8 include:

2005 Aston Martin AMV8 (400 hp)
2005 Land Rover Discovery/LR3 - 300 hp (220 kW), 315 ft.lb (425 Nm)
2006 Land Rover Range Rover Sport

5.0

A special 5.0 liter racing engine was produced with 550 hp, though no road car uses this engine.