Maserati 6CM (1936–1940) were 29 Italian single-seater racing cars made by Maserati of Modena. It was built on the Maserati 4CM frame, and front suspension as on Maserati V8RI. The first version had
- 1493.2 cc inline-6
- two OHV mounted 90 degree
- Roots type supercharger
- Weber carburetor 55ASI
- Scintilla ignition
outputting 155 bhp (116 kW) at 6200 rpm; Pirelli tyres. It weighed 650 kg (1,400 lb) and reached around 140 mph (230 km/h). A second version featured a larger engine (175 bhp at 6600 rpm) and semi-cantilever leaf springs (1938), and the third version had some minor adjustments (1939). The last two cars had four valves per cylinder, and in its last year, experiments with natural aspirations were made (1940).
Most cars were sold to private owners such as Austin Dobson, Lord Howe and John Peter Wakefield. Teams that ran the car were Scuderia Ambrosiana and Ecurie Helvetica. Maserati's own works team also ran (and won) the car in races such as Grand Prix of Naples and Targa Florio, using drivers Aldo Marazza, Luigi Villoresi and Ettore Bianco.