Sunday 21st April 1963

The 4th Imola Grand Prix was run to Formula One rules at the Autodromo di Castellaccis. The previous three Imola Grands Prix were sports car races held in the mid-1950s, and this was the first Formula One event held at the circuit. From 1981, the circuit was the venue for the San Marino Grand Prix. Run over 50 laps of the circuit, the race was won by British driver Jim Clark in a Lotus 25, lapping the entire field except for second-placed Jo Siffert. Trevor Taylor set the fastest lap after losing more than ten laps with a gear selector problem.