From March 1965 the Opel Diplomat was also available with a two-door coupé body. The car received the V8 engine in the 5303cc version (230 horsepower at 4700) which from September 1966 would also have equipped the sedan. Production, which went on until April 1967, was quite limited: 347 of the Diplomat Coupé were built. The coupe offered four or five comfortable seats. The lines that were perhaps too Americanized did not find the welcome that Opel expected.