Background
The XJ40 is Jaguar’s difficult second album; after the lithe XJ series cars, the angular XJ40 of the late eighties and early nineties found few friends – and a reputation for poor reliability and rusting at a rate that was considered excessive even by Jaguar enthusiasts didn’t help.
Which is a shame because the underpinnings were rather good - and time has been much kinder to the aesthetics than for some of its contemporaries. Like Clint Eastwood and Bruce Springsteen, the passage of years has only served to increase its appeal; what looked gawky and under-developed as a teenager has matured into a distinguished middle-age.
The early 3.6-litre cars were fitted with the standard AJ6 (Advanced Jaguar 6) engine, but the later 4.0-litre models were tweaked by TWR to include new inlet manifolds, sportier camshafts and a modified ECU and, in some cases, a large bore JaguarSport exhaust system.
Code-named ‘XJ81’, the fact that Jim Randle, the XJ40’s chief engineer, deliberately made the engine bay too narrow to fit the time-served Rover V8 engine (“I'm not letting them (expletive deleted) put that engine in my car!”, he is reputed to have said) meant the outgoing Series III V12 remained in production long after the six-cylinder cars had been culled from the firm’s catalogue.
But, contrary to the predictions of Jaguar’s senior managers, demand for larger engine’s persisted, which meant extensive revisions were needed to shoehorn in the wonderful six-litre V12 engine that’s fitted here.
It took until 1993 before the V12 engine arrived – and it was so powerful its installation caused yet another headache. You see Ford, Jaguar’s owners at the time, didn’t have a gearbox strong enough to cope with the V12’s torque, so it had to turn to rival firm GM for the four-speed automatic solution...
Manufacture ended in June 1994, which made the XJ81 had one of the shortest production runs of any Jaguar.








