Background
Jaguar’s executive express first broke cover in 1968, and what a glorious big cruiser it was. Refined, elegant and a consummate devourer of motorways, it became the go-to vehicle for bank managers and their ilk.
The original recipe – nicely proportioned styling, Jaguar’s legendary straight-six engine (in a tres hushed form), a restful suspension set-up, rack-and-pinion power steering and the option of an auto ‘box – was a winner, and one that evolved over the next few decades in terms of both performance and luxury.
Six-cylinder Series III XJ production ceased in 1987 with the arrival of its XJ40 replacement, while the 12-cylinder Series III cars continued to be built through to 1992.
The new car featured a revamped body, with fewer body pressings and improved structural rigidity. It was quieter, more refined and had a more angular aesthetic.
Out went the XK6 engine and in came the twin overhead-camshaft AJ6 inline six-cylinder unit. Initially available in two flavours (2.9-litre and 3.6-litre), these were increased to 3.2-litres and 4.0-litres respectively at the start of the Nineties.
Top of the XJ40 performance tree sat the XJR, introduced in 1988. Once off the main production line, the cars were finished in limited numbers by JaguarSport, a joint venture between Jaguar and Tom Walkinshaw Racing.
They had uprated suspension including bespoke Bilstein dampers, weightier steering, wider speedline alloy wheels and a body-coloured fibreglass styling kit of side skirts plus front and rear valances. The interior had some work too, with a leather MOMO steering wheel and JaguarSport embossed seat headrests. From 1991, the XJR’s quad headlamps were swapped for the rectangular units of the Sovereign.
Although early XJRs had the standard 3.6-litre engine, later models featured a TWR-tuned 4.0-litre, which developed 251bhp and 278lb.ft torque and good for a 0-60mph sprint in 7.2 seconds and top speed of 145mph.







