Background
With the unloved XJ40 still someway in the future, the mid-eighties were something of a Golden Age for Jaguar saloons: the achingly gorgeous XJ (‘eXperimental Jaguar’) had been recently refreshed by Pininfarina to create the series 3 model line and the range was benefitting from more than a decade of production line expertise, helping ease out some of the earlier cars’ wrinkles and proving that a properly sorted (for ‘properly sorted’ read ‘properly built’ because the integrity of the engineering had never been in doubt) Jaguar was a force to be reckoned with.
And if the series 3 Jaguar XJ was to steal the title of The Best Car in The World from the Germans it needed a better-than-average engine propelling it; while the straight sixes were a fine choice if halfway-decent fuel consumption was your goal, the magnificent 5.3-litre V12 was the engine you really wanted under that perfectly proportioned bonnet.
Now fitted with the high-compression Fireball cylinder head, the V12 now developed 299bhp alongside much better torque and slightly better fuel efficiency than the earlier cars. (Although, when we say that it was more fuel efficient you don’t need us to tell you that in the case of any V12-engined car, everything is relative…)







