Editing Jaguar AJ6 engine (section)

===2.9===

The {{convert|2919|cc|L|1|order=flip|abbr=on}} 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 {{convert|74.8|mm|in|2|abbr=on}}. Only the 1986–1989 [[Jaguar XJ|Jaguar XJ6]] used the 2.9. It was used for the entry-level XJ6 in Britain and Europe but rarely, if ever, seen in models exported to the US. The SOHC 2.9, which was generally considered somewhat underpowered for such a large car, was discontinued in late 1990 and replaced with a DOHC 3.2 (essentially identical to the DOHC 4.0).

The 2.9 Engine was, as in earlier years the 2.8 XK-engine, sized to match road-tax regulations in some European Countries like Italy or France. In France cars with more than 3 litres of engine size had to pay a luxury tax.

Unlike all other AJ6's, the 2.9l used Bosch LH Jetronic fuel injection and EZ-K ignition (rather than Lucas 9 or 15CU EMS)