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?

Despite a traditional image, Jaguar hasn’t always looked to its past. In the shadow of what might be its most dramatic shift yet, we look back at the last time Jaguar got brave.

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

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

And then there were seven!

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