Formula 1 world championship switches to F2 rules after Alfa Romeo withdrawal • British one-two in Monte Carlo Rally, Sidney Allard leading home Stirling Moss • Lance Macklin wins International Trophy in front of huge crowd • Monaco Grand Prix held to sportscar rules for first time, Luigi Fagioli dies after accident exiting the tunnel in practice • Ferrari enters the Indy 500, but Troy Ruttmann's wins with proven Offenhausen power • Pierre Levegh drives solo for 23 hours at Le Mans before his Talbot's engine expires when in the lead • Mercedes "gullwing" 300SL triumphs at La Sarthe with Hermann Lang and Fritz Riess • Karl Kling's similar car survives an impact with a vulture to win Carrera Panamericana
Alberto Ascari takes the first of six consecutive grand prix wins in '52 at Spa, on his way to the title
Hermann Lang and Fritz Riess win Le Mans following Pierre Levegh's retirement after 23 hours solo
Stirling Moss (Sunbeam-Talbot) finishes runner-up in the Monte Carlo Rally, behind Sidney Allard
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