Jaguar AJ6 engine
From Free net encyclopedia
{{Infobox Automobile
|name=Jaguar AJ6
|manufacturer=Jaguar Cars
|production=1984–1996
|class=DOHC I6
|predecessor=Jaguar XK6
|successor=Jaguar AJ-V6
|engine=3.6 L (3590 cc/219 in³)
2.9 L (2919 cc/178 in³)
3.2 L (3239 cc/197 in³)
4.0 L (3980 cc/242 in³)
}}
The AJ6 (and similar AJ16) was an inline-6 piston engine used by Jaguar in the 1980s and 1990s. It was designed to replace the much-loved Jaguar XK6 engine, and was introduced in 1984. The AJ6 was only the third engine ever designed by the company. The AJ6 was replaced in 1996 with the Ford Duratec-derived Jaguar AJ-V6 engine.
Jaguar had considered cutting the V12 in half to build a V6, or possibly a V8, but chose instead to develop a new inline-6. The cylinders are inclined, as in a slant-6, by 22 degrees. It is uses an aluminum block to reduce weight, and has an optional DOHC head for higher efficiency and power.
Contents |
AJ6
3.6
The 3.6 was the first AJ6 engine. It had DOHC 4-valve heads with a 91 mm bore and 92 mm stroke. Power was 165 kW with 325 Nm of torque.
Vehicles using the 3.6 were:
- 1984-1989 Jaguar XJS
- 1984-1989 Jaguar XJ6
- 1984-1989 Jaguar XJ6 Sovereign
- 1984-1989 Daimler
2.9
The 2.9 used a SOHC head from the Jaguar V12 engine, and was prone to failure. The block is the same as the 3.6, with the crankshaft and pistons lowering the stroke to 74.8 mm. Only the 1984-1989 Jaguar XJ6 used the 2.9.
4.0 (1989-1994)
The 24 valve DOHC 4.0 L (3980 cc) version replaced the AJ6 in 1989. It featured a longer 102 mm stroke, and generated 183 kW (235 hp) power and 392 Nm torque.
3.2 (1993-1994)
A 24 valve DOHC 3.2 L, essentially a shorter-stroke (83 mm) 4.0 L, replaced the 12 valve SOHC 2.9 in 1993. It produced 149 kW of power and 298 Nm of torque, and proved a popular engine in Europe (sales outnumbered 4.0 L saloons roughly 4:1) but was not exported to the America.
Interestingly, the Aston Martin DB7 featured a version of this engine fitted with an Eaton supercharger.
Cars using the 4.0 and 3.2 included:
- Jaguar XJS (4.0 only)
- Aston Martin DB7 (modified, supercharged 3.2)
- Jaguar XJ6
- Jaguar XJ6 Sovereign
- Jaguar XJ6 Sport
- Daimler
AJ16
4.0 / 3.2 (1994-1997)
For the launch of the new X300 saloon for 1995, substantial revisions were made to the 4.0 L and 4.0 L AJ6 engines. The new design was called the AJ16 to reflect the major differences between it and the original AJ6.
Cars using the 4.0 and 3.2 included:
AJ16S
A supercharged version of the 4.0 L AJ16 was released in 1996 in the Jaguar XJR which used an Eaton blower to boost output to 240 kW and 512 Nm.