Jaguar's series of XK sports cars used the remarkable twin overhead camshaft engine that was first unveiled in 1948 and took the motoring world by storm. By 1954, the XK120 was replaced by the more refined and restyled XK140 model, with an increase in power, optional overdrive, a roomier cockpit and top speed up to 130mph. In turn, it was replaced by what turned out to be the last of the line, the XK150.This book offers a full technical analysis of these two cars, covering all aspects of the chassis, running gear, engine and transmission, along with the different body types offered. Six outstanding examples of XK140s and XK150s are featured in colour photography specially commissioned for this book, accompanied by some 250 photographs from the Jaguar Daimler Heritage Trust, plus reproductions of XK sales and publicity material.