Starting in 1928, Chiron became a Bugatti factory driver in parallel to his role in Hoffman's private team. During that period, he became one of the dominant drivers in Grand Prix racing. He took major victories at the
1928 Italian Grand Prix,
1929 German Grand Prix, and
1930 Belgian Grand Prix. In the
Indianapolis 500 of 1929, he drove a
Delage to 7th place. He won the
1931 Monaco Grand Prix and
1931 French Grand Prix in a
Bugatti T51. He won the 1933
Spa 24 hours race with specialist endurance racer
Luigi Chinetti in an
Alfa Romeo 8C 2300 Monza. Chiron drove an
Alfa Romeo P3 run by Ferrari for the
1934 Grand Prix season. He won the
1934 French Grand Prix at
Montlhéry, against several works Mercedes-Benz and Auto Union entries, a race that is often considered one of the greatest victories of his career. The Alfa Romeos struggled against the German cars in
1935, and Chiron only salvaged a podium at the
1935 Belgian Grand Prix and a minor victory at the Lorraine Grand Prix that year. According to a
Los Angeles Times review of fellow driver
Hellé Nice's biography, Chiron accused her, at a 1949 party in
Monaco to celebrate the first postwar
Monte Carlo Rally, of "collaborating with the
Nazis". The review says biographer
Miranda Seymour is "circumspect on Nice's guilt". A review of the same book in
The New York Times says Nice was accused of being a "
Gestapo agent"; that Seymour "rebuts" the charge; and that it made Nice "unemployable". Seymour's book says that in a letter to
Antony Noghes, the head of the Monte Carlo Rally committee, Hellé Nice "protested her innocence"; that she told him she would appeal to the Monaco court unless Chiron wrote an apology; that no letter from Chiron has been found; and that the court has no record of such a case between 1949 and 1955. Chiron took part in the first ever Formula One World Championship season in
1950, as a factory Maserati driver. the only points scoring finish of his career. Paired with the Swiss driver
Ciro Basadonna, Chiron won the 1954
Monte Carlo Rally. His last race was in 1955, when he took a
Lancia D50 to sixth place in the
Monaco Grand Prix a few weeks before his 56th birthday, becoming the oldest driver to compete in a Formula One race. He is also the oldest driver ever to have entered for a Formula One race, taking part in practice for the
1958 Monaco Grand Prix when he was 58. == Later life and legacy ==