7 April

1957 Peter Collins won the non-championship Syracuse Grand Prix 1958 Mike Hawthorn won the non-championship Glover Trophy 1966 Walt Hansgen killed 1968 Jim Clark killed 1974 James Hunt won the non-championship BRDC International Trophy 1982 Harald Ertl died 1984 Niki Lauda won the South African Grand Prix 1985 Alain Prost won the Brazilian Grand Prix 1996 Damon Hill won the Argentinian Grand Prix 2005 Cliff Allison died