XJ 12 jest to nowy model napędzany 269-konnym silnikiem V 12 o pojemności 5343 cm³. Jest on ściśle spokrewniony z XJ 6.

JAGUAR XJ 12 £3,726
Unique in the world; a luxurious four-door saloon with the super smoothness of a twelve-cylinder engine that rockets it from rest to 100 m.p.h. in 20 seconds. A new grille with vertical slats distinguishes it from the XJ6. Ventilated front brake discs cope with the extra performance and automatic transmission is standard. Full equipment, includes a tiny electric fan to cool the battery. Only Jaguar could do it at the price.
JAGUAR E V12 £3,367 The smooth surge of twelve-cylinder power gives new charm and still faster acceleration to Jaguar's classic sports car. It now rushes from 0 to 100 m.p.h. in under 16 seconds. Ventilated front disc brakes and anti-dive suspension guarantee safe, swift stops. Power steering and a limited-slip differential are added and new fresh air ducts improve the ventilation. Coupé and convertible bodies are offered.
London show review

Jaguar XJ 12

XJ 6 in the USA