He repeated as champion at Mugello the next year and took third place at the Targa Florio but did not earn another major championship until he captured the French Grand Prix in 1924 when he was part of a powerful three-man Alfa Romeo team with Count Gastone Brilli-Peri and Antonio Ascari in the P2 cars designed by Vittorio Jano.
Po koncu vojne se je dirkanje nadaljevalo v sezoni 1920, ko je Campari dosegel svojo prvo pomembnejšo zmago na dirki Velika nagrada Mugella v Toskani.