The cars by this time were single-seaters (the riding mechanic vanished in the early 1920s), with 8 to 16 cylinder supercharged engines producing upwards of 600 hp (450 kW) on alcohol fuels.
Os coches deste momento eran monoprazas (o mecánico a bordo desapareceu a principios dos anos 1920), con motores de 8 a 16 cilindros sobrealimentados producindo máis de 600 CV con combustibles de alcohol.