Grand Prix of Portugal 1991 Published 3. July 2018 Circuit Estoril Date 22.09.1991 Laps 71 Distance 308,850 km /191,913 miles No Driver Ferrari S/N Team Result 27 Alain Prost 643 130 Scuderia Ferrari retired/engine 28 Jean Alesi 643 129 Scuderia Ferrari 3.