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The 1932 24 Hours of Le Mans was the 10th Grand Prix of Endurance that took place at the Circuit de la Sarthe on 18 and 19 June 1932. A significant year for the Automobile Club de l'Ouest (ACO) with the biggest changes to the circuit in the race's history. A new section bypassing Pontlieue suburb was built starting with a long right turn after the pits, going over a hill then down to the Esses, a left-right combination, before rejoining the Hunaudières straight at the new right-hand corner of Tertre Rouge. This shortened the track by almost 3 km down to 13.491 km (8.383 mi).
On paper it looked like it would be a race between the seven 2.3-litre supercharged Alfa Romeos and the two similarly powered Bugatti T55 four-seaters (backed by the Bugatti factory). But from the start it was the Alfa Romeos that set the pace, led by the two works cars in a furious duel. But a first-lap accident by a privateer Bentley at the tricky White House corners caused much disruption for drivers who would not slow down. First Minoia went off at the same place, taking Brisson's Stutz with him, then Marinoni smacked the Bentley trying to make up for an hour lost digging himself out from the Arnage sandbank after another excursion.
After the first pit stops around 6pm, the works Alfa of Franco Cortese held the lead. But when that car had to pit around 10pm to get its windscreen fixed, it was the similar car of 1931 winners, Earl Howe and Birkin that took its place. Their chance of a repeat win ended with a blown gasket at 3am, whereupon Raymond Sommer took the lead. He was forced to drive most of the race himself as his co-driver, Italian ex-pat Luigi Chinetti, had got a fever after working long hours to prepare their short-wheelbase Alfa Romeo for the race. Having driven one 3-hour shift Chinetti was unable to do any more.
As dawn broke, Cortese/Guidotti were closing on him, but their challenge wilted as they had to make repeated stops to secure loose and broken parts of their car. Their delays allowed the remaining Bugatti of Czaykowski / Friderich, now running third seven laps back, to start chasing them down. That chase came to an end though after midday, when the Bugatti came to a halt on the track having got down to four laps in arrears. This took the pressure off the two Alfa Romeos.
Meanwhile, behind the race for outright victory was the quest for winning the Biennial Cup. The initial six eligible cars from the 1931 race had quickly been whittled down to just three: the 3-litre Talbot, versus the smaller 1.5-litre Aston Martin and 1.1-litre Caban. For most of the race, the three cars were running very closely to their designated target distances. Just as one would start building a lead over the others it would be stymied by mechanical delays. As the main race ran down to a predictable finish, it was only on the Sunday afternoon that the Aston Martin of "Bert" Bertelli / Pat Driscoll got enough reliability to pull out a sufficient gap to claim the Biennial Cup.
In the end Sommer won by two laps. In a remarkable drive he had been at the wheel for over twenty hours, and during the Sunday, the exhaust pipe had broken that left it pumping its noxious fumes into the cockpit. His distance covered also won the Index of Performance, going over 20% beyond the designated target. Cortese and Guidotti were second in the works Alfa Romeo. After many tribulations, the Talbot of Lewis / Rose-Richards had pushed hard enough to finish third, albeit 36 laps behind. Fourth was Odette Siko’s privateer Bugatti entry – still the best overall finish by a female driver at Le Mans.