Jaguar XK150: disc brakes, wider shoulders and the last of the line (1957–1961) The Jaguar XK150 closed the XK story with four-wheel disc brakes, a wider modern body and, in 3.8 S form, the pace that previewed the E-Type. A guide to the 3.4 and 3.8 cars, the S models, how the 150 differs from the XK140, what to check when buying, and what one costs today.
