The Sigma MC74 powered by a Mazda 12A engine was the first engine and only team from outside Western Europe or the United States to finish the entire 24hours of the 24 Hours of Le Mans race, in 1974. Yojiro Terada was the driver of the MC74. Mazda was the first team from outside Western Europe or the United States to win Le Mans outright. It was also the only non-piston engined car to win Le Mans, which the company accomplished in 1991 with their four-rotor 787B ( displacement), rated by FIA formula at ). In the C2 class, all participants had the same amount of fuel. The only exception was the unregulated C1 Category 1. This category only allowed naturally aspirated engines. The Mazdas were classified as naturally aspirated to start with 830 kg weight, 170 kg less than the supercharged competitors. The cars under the Group C1 Category 1 regulations for 1991 were allowed to be another 80 kg lighter than the 787B.Tare weight Peugeot 905 750kg In addition, Group C1 Category 1 had only permitted 3.5-liter naturally aspirated engines and had no fuel quantity limits.
The Sigma MC74 powered by a Mazda 12A engine was the first engine an,d only team from outside Western Europe or the United States to finish the entire 24hours of the 24 Hours of Le Mans race, in 1974. Yojiro Terada was the driver of the MC74. Mazda was the first team from outside Western Europe or the United States to win Le Mans outright. It was also the only non-piston engined car to win Le Mans, which the company accomplished in 1991 with their four-rotor 787B ( displacement), rated by FIA formula at ). In the C2 class, all participants had the same amount of fuel. The only exception was the unregulated C1 Category 1. This category only allowed naturally aspirated engines. The Mazdas were classified as naturally aspirated to start with 830 kg weight, 170 kg less than the supercharged competitors. The cars under the Group C1 Category 1 regulations for 1991 were allowed to be another 80 kg lighter than the 787B.Tare weight Peugeot 905 750kg In addition Group C1 Category 1 had only permitted 3.5-liter naturally aspirated engines and had no fuel quantity limits.