The Maserati 4CM was a single-seater racecar built by Maserati, from 1932 to 1938. It was produced in different series, that were distinguished by the engine displacement, that were respectively of 1100, 1500, 2000 and 2500 cc. The 1100 version was the first single-seater car built by Maserati, and was assembled from 1932 to 1937. The 1500 version was built from 1934 to 1938, the 2000 version in 1933 and the 2500 version from 1934 to 1937.
The 1100 version drew its origins from 4CTR's mechanics, suitably modified and improved. It also had hydraulic brakes with two pumps and two circuits; that was a better solution compared to the previously adopted solutions, which were steel cables. A 440 kg (970 lb) version was prepared, after a 470 kg (1 036 lb) intermediate with an engine power of 145 HP at 6500 RPM. In 1937, the last variant was produced, with frame and body being similar to the 6CM.
The 1500 was born in an interest wave about its class, and brought many international orders.
The 2000 was built as an only model in 1933, and mounted a 4 cylinder with an exceptional couple spread in most of the speed of rotation. It had the steering group laterally mounted in the motor; therefore, the pilot seat was slightly lateral. Of the 2000 there's only one car, which is kept in the Montague Museum in Beaulieu. Although some sources report the existence of a second model, Maserati's historical archive confirms the presence of another one, but with 2500-cylinder propeller.
In 1933, a 2500cc engine was built, juxtaposed to the 2000, whence it drew inspired. It was intended for the Grand Prix category. The propeller was then coupled with a definitely outdated frame, with mechanically controlled brakes and a slightly longer step than on the 2000. The 2500 was an only model, too.
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