Harold Beach was sent to Italy to work with Touring. Their ‘Superleggera’ (‘superlight’) body construction with alloy panels fixed over a tubular frame demanded a platform chassis, which Beach designed in just six weeks. Touring’s Federico Formenti penned a sleek body for the new chassis and two prototypes were built in Milan. Then the craftsmen at Newport Pagnell took over Superleggera body construction for the DB4 under licence from Touring, who supplied body jigs.
A new 3670cc six-cylinder engine was designed by Tadek Marek. The DB4 was one of the fastest cars on the road, able to go from 0 to 100 mph and back in under 30 seconds.