The Lanchester 15/18, also known as the Eighteen, was a family of cars that was first introduced in 1932. The 15/18 was available in a selection of open and closed body styles, and was powered by an inline six engine, which evolved in displacement over the course of production. Regardless of engine, drive was sent to the rear wheels through a manual transmission. The Lanchester 15/18 or Eighteen was built until 1939.