27 April

1902 Rudolf Schoeller born 1933 Bob Bondurant born 1943 Helmut Marko born 1952 Alberto Ascari won the non-championship Marseilles Grand Prix 1963 Graham Hill won the non-championship Aintree 200 1975 Jochen Mass won the Spanish Grand Prix 1986 Alain Prost won the San Marino Grand Prix 1997 Heinz Harald Frentzen won the San Marino Grand Prix