Background
Unveiled in 1957, the XK150 was the successor to the XK140. Available as a fixed head and drophead coupé, Jaguar also offered a stripped-down roadster named the XK150 OTS (open two-seater), which lacked any weather protection whatsoever - and while the convertibles were strictly two-seaters, the coupé offered a pair of vestigial seats in the rear.
Visually very similar to the earlier XK models, the XK150 was nonetheless heavily revised including a one-piece windscreen, a wider bonnet and more streamlined front wings. Offered in a huge range of colours, all featured a leather-covered dashboard as standard and optional walnut veneer.
The 3.4-litre straight-six engine was broadly similar to the XK140’s too, but featured the ‘B’ type cylinder head which lifted power to a heady 180bhp. The SE, or Special Equipment, model arrived in 1958 bringing with it twin 1.75-inch SU carburettors, larger exhaust valves and 210bhp.
And, if even that wasn’t enough for you then the ‘S’ engine featured three carbs and a straight-port cylinder head to bring 250bhp. This gave the XK150 a top speed of just over 130mph and a 0-60mph time of just under eight seconds.
The 3.8-litre engine that you see here arrived in late 1958, and while the increase in capacity might only have been 400cc. it churned out 265bhp giving the XK150 a top speed of 135mph. It could also cover the 0-60mph sprint in under seven seconds, which was staggeringly quick for the period.
It is a clever car underneath too, with Dunlop disc brakes available on all four corners and manual rack-and-pinion steering.
All-in-all, Jaguar built 2,265 roadsters, 4,445 fixed-head coupés, and 2,672 drophead coupés by the time the XK150 made way for the E-Type in late 1960.








