300 Miles Per Hour(1935)

Original title: Trois cents à l'heure

In the eyes of his wife, whom he is cheating on with an actress, Count Adrien passes himself off as the famous mask racer who has won countless car races. Chance forces him to really run and he is replaced by a drunken mechanic who wins. The mechanic uses blackmail and takes the count's place with his wife and his mistress.