Classic Cars European car 

1937 Mercedes W125 (Video)

With the rapid development of technology, Grand Prix racing was subject to constant changes in the 1920s and early 1930s and sport’s governing body (AIACR) struggled to create a definitive set of regulations that would work with the various engine configurations raced at the time. In 1932 they came up with a Grand Prix formula with a maximum weight of 750 kg (sans fluids, wheels and tires) for 1934, 1935 and 1936. The Association Internationale des Automobiles Clubs Reconnus figured this maximum would sufficiently reign in and level performance. They were proven very wrong as Auto Union and Mercedes-Benz produced some of the fastest and dangerous Grand Prix racers. The designers reserved as much weight as possible for massive supercharged engines and shaved off weight from the chassis and suspension by cross-drilling every component. Needless to say this is a very dangerous combination. To set things straight the AIACR drew up new displacement based regulations for the 1937-1939 period, but they could not agree in time and the changes were postponed and another season was run under the 750 kg regulations.

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