The Honda S2000 is a roadster manufactured by the Japanese automaker Honda Motor Company. It was launched in April 1999 and was created to celebrate the company's 50th anniversary. The car was first shown as a concept at the Tokyo Motor Show in 1995, following which it was launched in world markets in 1999. The S2000 is named for its engine displacement of 2 L, carrying on in the tradition of the S500, S600, and S800 roadsters of the 1960s. Several revisions were made throughout the car's lifetime, including changes to the engine, gearbox, suspension and interior and exterior. Officially two variants exist: the initial launch model was given the chassis code AP1, while the AP2 designation was given to vehicles produced from mid- 2003 onwards. Though cosmetically similar, the AP2 incorporated significant changes to the drivetrain and suspension. Production of the S2000 ceased in June 2009.