Renault 40 CV
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!