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Mercedes-Benz W154
The Mercedes-Benz W154 was a Grand Prix racing car designed by Rudolf Uhlenhaut. The W154 competed in the 1938 and 1939 Grand Prix seasons and was used by Rudolf Caracciola to win the 1938 European Championship.
The W154 was created as a result of a rule change by the sports governing body AIACR, which required supercharged engine capacities to be limited to 3000cc. Mercedes' previous car, the W125 used a 5700cc engine and was therefore ineligible to be entered. Mercedes decided that a new car, designed from the outset to comply with the new regulations would be preferable to modifying the existing car and thus designed the W154.
Although using the same chassis design as the 1938 car, a different body was used for the 1939 season and the M154 engine used during 1938 was replaced by the M163. As a result of the new engine, the 1939 car is often mistakenly referred to as a Mercedes-Benz W163.〔(Mercedes-Benz W154 (1939 body) (Grand Prix 3 Litre) )〕
==Concept==
For the 1938 season, Grand Prix racing's governing body AIACR moved from a formula limited by weight to one limited by engine capacity. This meant Mercedes-Benz's previous car, the W125, was not eligible for entry into 1938 Grands Prix. When designing the new car, Mercedes based the chassis on that used in the W125. The new engine regulations allowed a maximum capacity of 3000cc with a supercharger or 4500cc without. After testing both types, Mercedes chose to use a supercharged 3000cc variant.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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