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The Mercedes – Benz W196 was the Mercedes-Benz Formula 1 entry in the 1954 and 1955 Formula One seasons, winning 9 of 12 races entered in the hands of Juan Manuel Fangio and Stirling Moss. The new 1954 Formula One rules allowed engines of 2.5 litres naturally aspirated or, alternatively, 0.75 litres supercharged. The expected target range for competitive engines was 250 to 300 bhp (190 to 220 kW).Mercedes’ 1939 2-stage supercharged 1.5-litre 64.0×58.0 mm V8 (1,493 cc or 91.1 cu in) gave 278 bhp (207 kW) at 8,250 rpm with about 2.7 atm (270 kPa) pressure. Halving this would have only produced 139 bhp (104 kW). Studies by Mercedes showed that 290 bhp (220 kW) at 10,000 rpm could be achieved from 0.75 litres with a supercharger pressure of 4.4 atm (450 kPa). 390 shp (290 kW) would have been developed with 100 hp (75 kW) being required to drive the supercharger. Fuel consumption would have been 2.3 times higher than a naturally aspirated engine developing the same power.
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