The DB 2/4 Mark III (normally simply called DB Mark III, even at the time of its introduction) is a sports car 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 W.O. Bentley-designed Lagonda 2.9 L (2922 cc/178 in³) straight-6 engine, redesigned by Tadek Marek.