Maserati has made three inline-4 racing engines, that were designed for both Formula One and Sports car racing. Their first engine was the supercharged 4CLT engine in 1950; with the 1.5 L engine configuration imposed by the FIA for engines with forced induction.^[2][3][4] Their second engine was the naturally-aspirated 250S engine; with the 2.5 L engine configuration, and was used by Cooper and JBW. Their third and final engine was the naturally-aspirated Tipo 6-1500; with the 1.5 L engine configuration, and the customer engine was used by Cooper, Emeryson, Lotus, and E.N.B. teams.^[5]

A 1.5 L (92 cu in) version of the engine was used in the Maserati 150S, (as well as the Maserati 150 GT concept car^[6][7][8])^{[9][10][11][12]} and a 2.0 L (120 cu in) version of this engine was also used in the 1955-1959 Maserati 200S sports car.^{[13][14][15][16][17][18]}