1958 Jaguar XK150 S

The final iteration in the XK series was the XK150, which was introduced in May 1957 as a 1958 model. Although recognizably a member of the Jaguar family, it was wider and not nearly as swoopy as the earlier XKs, and the distinctive grill had a much more delicate appearance than its predecessor. Although the chassis was carried over unchanged from the 140, standard equipment now included four-wheel disc brakes, which was a first for a car built in series production.

Under the wider bonnet lurked the familiar twin-cam, straight-six, which was almost as pretty as the car itself. The standard engine was rated at 190 bhp, but a 210bhp SE version was also offered. More power soon followed with the S version of the 3.4 liter engine, which breathed through triple SU carburetors to generate 250bhp.

In 1958, Jaguar added a lighter roadster version to the line-up. Available in both standard and S versions, it had a sleeker appearance but still offered roll-up windows.