Morgan first introduced the +4 in 1950. This new model of sports cars featured a longer chassis than its sibling, the Morgan 4/4, and was offered in two or four door roadster, or two or four door drophead coupe. The first generation of +4 was initially powered by a 68hp 2.1L inline four engine, but in 1953, it was replaced by a more powerful 2.0L Triumph-sourced unit. This engine only lasted until 1955, when Morgan updated it with the 2.0L unit from the Triumph TR3. From 1962 onwards, the larger 2.1L inline four engine from the Triumph TR4 was used. Production of the first generation +4 lasted until 1969, when it was replaced by the Second Generation Morgan +4.