The DB 2/4 Mark III (normally simply called DB Mark III, even at the time of its introduction) is a grand tourer sold by Aston Martin from 1957 until 1959. It was an evolution of the DB2/4 Mark II model it replaced, using an evolution of that car's 2.9-litre Lagonda straight-6 engine.
It was succeeded by the Aston Martin DB4 in 1958.
Overview
Changes included the front grille (designed by Bert Thickpenny and first seen on the DB3S) that would become the shape of all future Aston Martin models, a new instrument panel that replicated the shape of the grill, and after the first 100 cars Girling disc brakes. The hydraulically operated clutch was new as well, and an optional Laycock-de Normanville overdrive was offered with the standard four-speed gearbox, even an automatic transmission was available. Worm-and-sector steering and a live axle rear end were carryovers. At the rear, the DB2/4 Mark II's tailfins grew (after the 100 cars) and were altered to use the Lucas rear lights from the Humber Hawk and Alvis TD21.
At the time Aston Martin had already started to consider a replacement for the Frank Feeley designed DB2 series of cars ultimately resulting in the DB4.