 Complete the following phrase:  Fangio won three more championship races for Alfa in 1951 in the Swiss, French and Spanish Grands Prix, and with the new 4.5-litre Ferraris taking points off his teammates Farina and various others, Fangio took the title at the final race in Spain, finishing six points ahead of Ascari at the Pedralbes street circuit. Fangio also finished 2nd at the British Grand Prix at Silverstone after his horrendously fuel-inefficient Alfa had to make 2 lengthy pit stops for fuel, and he finished 2nd at the 