[1] Costantini's Bugatti took the lead early, with the other two Bugattis battling with the two Maseratis over the first two laps, the gap between second and fifth place just 5 seconds after the first lap, with the Chiribiri of Serboli down the field with the 1100cc cars.

After just four laps, Maserati retired with engine failure, followed one lap later by team-mate Materassi, also with engine failure, leaving just the three Bugattis and the lone struggling Chiribiri in the 1500cc class.

[1] The Chiribiri of Serboli eventually retired after 27 laps in a spectacular fire in the otherwise dull race.

Once the cyclecars had finished their 40 laps, the two remaining Bugattis continued uneventfully until nearly the end of the race.

However, on his 58th lap, Costantini, who had totally dominated the race experienced engine trouble, but was able to crawl around to the pits.