The Series I is regarded by many as the finest XJ of all, which partly explains today’s hefty asking prices – but what do you need to know before taking the plunge?

ASKING £10,000 PRICE ENGINE 4253cc/6-cyl/DOHC POWER 200bhp@5000rpm TORQUE ...

(1966-1970)

This already rare XK150 3.8S FHC has had a fascinating life. Beautifully set up, it also drives as well as it looks

Why this Triumph wasn’t overlooked come sale time

ASKING £19,995 PRICE ENGINE 4196cc/V8/DOHC POWER 400bhp@6100rpm TORQUE ...