| Maserati 4CM[1] | |
| Designer: | Maserati |
| Production: | 1932-1938 |
| Predecessor: | Maserati Tipo 26 |
| Successor: | Maserati 6CM |
| Configuration: | FR layout |
| Engine Name: | I4 |
| Gearbox Name: | 4 speed manual transmission |
| Chassis: | Steel box-section frame, aluminum body |
| Front Suspension: | Rigid axle, semi-elliptic leaf springs, friction shock absorbers |
| Rear Suspension: | Live axle, semi-elliptic leaf springs, friction shock absorbers |
| Track: | (front and rear) |
The Maserati 4CM is an open-wheel Grand Prix motor racing car, designed, developed and built by Italian manufacturer Maserati, in 1931.[2] [3]
In 1930, Maserati decided to concentrate its efforts on the voiturette class, which was not contested by German manufacturers such as Mercedes-Benz and Auto Union. The Tipo 4CM was Maserati's first racing voiturette.[4] The name of the car is derived as follows:
4: 4-cylinder engine
C: Corsa, for racing
M: Monoposto, for single seaterBuilt alongside the 4CS two-seater sports-racer, the 4CM was powered by a, (65 x 82 mm) twin-overhead-camshaft supercharged four-cylinder engine that produced at 6,600rpm, an output sufficient to propel it to a top speed of . Some cars came with a spare cylinder block, pistons, connecting rods and supercharger enabling it to be converted to, (69 x 100 mm) when required. Depending on the size of the engine, the roots-type supercharger boosted power to .[5] [6]
It succeeded the Maserati Tipo 26M, and was itself slowly replaced by the Maserati 6CM around 1936.[7] [8]
| ! 4CS-1100 | 4CM-1100 ! 4CM-1500 | 4CM-2000 ! 4CM-2500 | - | engine | - | 1088cc | 1496cc | 1970cc | 2483cc | - | 65 mm × 82 mm | 69 mm × 100 mm | 80 mm × 98 mm | 84 mm × 112 mm | - | 5.1 : 1 | 6.0 : 1 | 5.8 : 1 | 5.8 : 1 | - | Power at 1/min | at 5,300 rpm | at 6,000 rpm | at 5,500 rpm | at 5,300 rpm | - | valve control | - | body and frame | - | 2700 mm | 2400 mm | 2450 mm | - | curb weight (without driver) | 630 kg | 580 kg | 600 kg | - | top speed | |||||||||||||||||||||||||||||||||
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