The DB4 is a grand tourer that was produced by Aston Martin from 1958 until 1963. Technically the DB4 was not a development of the DB Mark III it replaced. It had a platform rather than a tubular chassis with a new engine by Tadek Marek. The DB4's design formed the basis for later Aston Martin models, such as the DB4 GT Zagato, the Lagonda Rapide 4-door saloon.