In the 1920s, almost every car manufacturer went to great lengths to try and break speed records. Renault decided to take up the challenge with its large 40 CV fitted with a huge, nine-litre plus engine. This beast of a car broke the single lap record at a speed of 178.475kph and the 24-hour record at an average speed of 141.03kph, despite using about a hundred tyres! A few months later, Plessier and Gartfield came up with a more streamlined design for the car. Pit stops were also worked on in unprecedented fashion, producing unequivocal results: the updated version set a new 50-mile speed record of 190.013kph and clocked an average of 173.649kph over 24 hours!