Morgan had introduced its first four wheel vehicle in 1936 as the 4/4, and from 1946 this used the 1256cc Standard Special engine. When this engine went out of production because Standard were concentrating on the new Vanguard model, Morgan took up this 2088cc 4-cylinder engine and produced their new Morgan Plus Four. The Plus Four was developed by the fitting of the 1991cc Triumph TR2 engine from 1954, but still using an ash frame. The flar radiator grille was also 'modernised' with a sloping cowl. From 1956 the Plus Four was given a 1991cc Triumph TR3 engine and from 1959 Disc Brakes. There was a Plus Four Super Sport in 1961 with 116bhp engine. Peter Morgan introduced the Plus Four Plus at the 1963 Earls Court Motor Show, built on a stronger chassis, an upgraded Triumph TR4 engine and a glass fibre coupe body by E.B. Plastics Ltd., of Stoke-on-Trent. Intended to be a limited edition of just 50 cars, in fact only 26 were ordered. The ordinary Plus Four continued until 1966 and was eventually replaced by the V8-engined Morgan Plus Eight in 1969. In 1985 the Plus Four is re-introduced based around a Fiat twin cam engine, and in 1988 it is given a Rover 2-litre engine and production continues until 2000. A new Ford-engined Plus Four is introduced in 2004.