Aston Martin's post-war evolution took a giant step forward with the launch of the DB4 in 1958. Classically proportioned, the Carrozzeria Touring-designed body established an instantly recognisable look that would stand the marque in good stead until 1970. The engine was still an all-alloy, twin-overhead-camshaft, six but the old W O Bentley supervised 3.0-litre unit had been superseded by a new design by Tadek Marek. The new 3,670cc engine featured 'square' bore and stroke dimensions of 92mm, and developed its maximum power of 240bhp at 5,500rpm. The David Brown gearbox was a new four-speed all-synchromesh unit.

Touring's Superleggera body construction, which employed a lightweight tubular structure to support the aluminium-alloy body panels, was deemed incompatible with the DB2/4-type multi-tubular spaceframe, so engineer Harold Beach drew up an immensely strong platform type chassis. The DB2/4's trailing-link independent front suspension gave way to unequal-length wishb