The XK story came to a screeching halt due to the AJ6, which evolved into the AJ16. Said engine families would be replaced by the AJ-V6. The latest V6 to come from Jaguar is the V8-derived AJ126 ...

Jaguar installed a 4.0-liter version of its AJ6 straight-six engine and started developing a 330bhp twin-turbo version. The car also gained more weight, becoming even wider than the XJS.

The most significant mechanical change came a couple of years later, though, with the introduction of the 3.6-litre AJ6 engine, which was being readied for the forthcoming XJ40. Regarded as one of ...

While the Jaguar brand has been associated with straight sixes for longer than any other type of engine, buyers haven’t been able to choose one in a new car since the twin-cam AJ6 died in 1997.