NAKAMA188 The concern with efficiency and the precedent of several low-volume, high-performance European cars explains the decision to adopt the twincam configuration, even though dohc engines were hardly the norm in prewar British cars. Commercial considerations aside, this line is significant because it ushered in one of the most adaptable and long-lived engines in postwar history. A changing market hastened the XK-140's replacement, which debuted in mid-1957 as the XK-150. That a car as stunningly different as the XK-120 could have appeared so soon after the war -- and from a small company that was down if not out -- is nothing short of amazing.|Though Arguably less Graceful in Appearance