In 1936, after a prototype had been tested in trials and on the track, a four-wheeler was exhibited at the London and Paris Exhibitions. The new model was called the Morgan 4-4 to differentiate it from the three-wheeler, indicating four cylinders and four wheels. The car had a Z section full width steel chassis with boxed cross members and the body was an ash frame panelled in steel. The combination provided the durability of a coachbuilt car with the lightness required for a sports car. The car was an immediate success. After the launch of the Morgan 4-4 Roadster a four-seater was introduced, followed in quick succession by a Drophead Coupe in 1938. The three-wheeler remained in production although sales of the V-twin engined cars were in decline. The F-type however, remained popular and 1938 saw the addition of a high performance two-seater version, called the F Super.