| Type: | F1 |
| Country: | Spain |
| Flag Suffix: | 1945 |
| Grand Prix: | Spanish |
| Official Name: | XI Gran Premio de España |
| Date: | 28 October |
| Year: | 1951 |
| Previous Round: | 1951 Italian Grand Prix |
| Next Round: | 1952 Swiss Grand Prix |
| Location: | Pedralbes Circuit, Barcelona, Catalonia |
| Course: | Street circuit |
| Course Mi: | 3.925 |
| Course Km: | 6.316 |
| Distance Laps: | 70 |
| Distance Mi: | 274.721 |
| Distance Km: | 442.120 |
| Weather: | Hot, Dry |
| Pole Driver: | Alberto Ascari |
| Pole Team: | Scuderia Ferrari |
| Pole Time: | 2:10.59 |
| Pole Country: | Italy |
| Fast Driver: | Juan Manuel Fangio |
| Fast Team: | Alfa Romeo |
| Fast Time: | 2:16.93 |
| Fast Country: | Argentina |
| First Driver: | Juan Manuel Fangio |
| First Team: | Alfa Romeo |
| First Country: | Argentina |
| Second Driver: | José Froilán González |
| Second Team: | Scuderia Ferrari |
| Second Country: | Argentina |
| Third Driver: | Nino Farina |
| Third Team: | Alfa Romeo |
| Third Country: | Italy |
The 1951 Spanish Grand Prix was a Formula One motor race held on 28 October 1951 at Pedralbes Circuit. It was the eighth and final race of the 1951 World Championship of Drivers.
This race was determined by tyre choice – Ferrari chose a 16-inch rear wheel, whilst Alfa Romeo settled for the 18 inch, which proved to be the better of the two options.Juan Manuel Fangio led Alberto Ascari by two points before the race. Ascari led the race from José Froilán González, but the Ferraris suffered numerous tread problems. Piero Taruffi threw a tyre tread on lap 6 and was followed on lap 7 by Luigi Villoresi, Ascari on lap 8 and Gonzalez on lap 14. The Ferraris were forced to stop frequently to change tyres and Fangio comfortably won the race and his first drivers' title, after Ascari finished 4th was not able to overhaul Fangio's total. After the race, Alfa Romeo announced that due to lack of finances, they would not be competing in the 1952 season.
— Peter Whitehead and Reg Parnell both withdrew from the event prior to practice.[3]
— Juan Jover qualified in the #46 Maserati, although he did not start the race. Joaquin Palacio had been entered in car #46, but he withdrew prior to practice.[3]
— Toni Branca withdrew from the event prior to practice. Chico Landi had also been entered in car #48, but he too withdrew from the Grand Prix before practice.[3]
| Pos | No | Driver | Constructor | Time | Gap |
|---|---|---|---|---|---|
| 1 | 2 |  Alberto Ascari | Ferrari | 2:10.59 | – |
| 2 | 22 |  Juan Manuel Fangio | Alfa Romeo | 2:12.27 | + 1.68 |
| 3 | 6 | José Froilán González | Ferrari | 2:14.01 | + 3.42 |
| 4 | 20 | Nino Farina | Alfa Romeo | 2:14.94 | + 4.35 |
| 5 | 4 | Luigi Villoresi | Ferrari | 2:16.38 | + 5.79 |
| 6 | 26 |  Toulo de Graffenried | Alfa Romeo | 2:16.40 | + 5.81 |
| 7 | 8 | Piero Taruffi | Ferrari | 2:16.80 | + 6.21 |
| 8 | 24 | Felice Bonetto | Alfa Romeo | 2:21.80 | + 11.21 |
| 9 | 14 |  Robert Manzon | Simca-Gordini | 2:23.81 | + 13.22 |
| 10 | 16 | André Simon | Simca-Gordini | 2:24.60 | + 14.01 |
| 11 | 12 | Maurice Trintignant | Simca-Gordini | 2:25.25 | + 14.66 |
| 12 | 30 |  Louis Chiron | Talbot-Lago-Talbot | 2:30.32 | + 19.73 |
| 13 | 34 | Philippe Étancelin | Talbot-Lago-Talbot | 2:31.00 | + 20.41 |
| 14 | 32 | Yves Giraud-Cabantous | Talbot-Lago-Talbot | 2:32.18 | + 21.59 |
| 15 | 36 |  Johnny Claes | Talbot-Lago-Talbot | 2:34.46 | + 23.87 |
| 16 | 38 | Georges Grignard | Talbot-Lago-Talbot | 2:35.58 | + 24.99 |
| 17 | 44 |  Paco Godia | Maserati | 2:37.45 | + 26.86 |
| 18 | 46 | Juan Jover | Maserati | 2:41.99 | + 31.40 |
| 19 | 18 |  Prince Bira | Maserati-OSCA | 2:45.99 | + 35.40 |
| 20 | 28 | Louis Rosier | Talbot-Lago-Talbot | 2:46.78 | + 36.19 |
| Pos | No | Driver | Constructor | Laps | Time/retired | Grid | Points | |
|---|---|---|---|---|---|---|---|---|
| 1 | 22 | Juan Manuel Fangio | Alfa Romeo | 70 | 2:46:54.10 | 2 | 9 | |
| 2 | 6 | José Froilán González | Ferrari | 70 | +54.28 | 3 | 6 | |
| 3 | 20 | Nino Farina | Alfa Romeo | 70 | +1:45.54[4] | 4 | 4 | |
| 4 | 2 | Alberto Ascari | Ferrari | 68 | +2 laps | 1 | 3 | |
| 5 | 24 | Felice Bonetto | Alfa Romeo | 68 | +2 laps | 8 | 2 | |
| 6 | 26 | Toulo de Graffenried | Alfa Romeo | 66 | +4 laps | 6 | ||
| 7 | 28 | Louis Rosier | Talbot-Lago-Talbot | 64 | +6 laps | 20 | ||
| 8 | 34 | Philippe Étancelin | Talbot-Lago-Talbot | 63 | +7 laps | 13 | ||
| 9 | 14 | Robert Manzon | Simca-Gordini | 63 | +7 laps | 9 | ||
| 10 | 44 | Paco Godia | Maserati | 60 | +10 laps | 17 | ||
| Ret | 4 | Luigi Villoresi | Ferrari | 48 | Ignition | 5 | ||
| Ret | 16 | André Simon | Simca-Gordini | 48 | Engine | 10 | ||
| Ret | 36 | Johnny Claes | Talbot-Lago-Talbot | 37 | Accident | 15 | ||
| Ret | 8 | Piero Taruffi | Ferrari | 30 | Wheel | 7 | ||
| Ret | 12 | Maurice Trintignant | Simca-Gordini | 25 | Engine | 11 | ||
| Ret | 38 | Georges Grignard | Talbot-Lago-Talbot | 23 | Engine | 16 | ||
| Ret | 32 | Yves Giraud-Cabantous | Talbot-Lago-Talbot | 7 | Accident | 14 | ||
| Ret | 30 | Louis Chiron | Talbot-Lago-Talbot | 4 | Ignition | 12 | ||
| Ret | 18 | Prince Bira | Maserati-OSCA | 1 | Engine | 19 | ||
| DNS | 46 | Juan Jover | Maserati | 0 | Engine | 18 | ||
| Pos | Driver | Points | ||
|---|---|---|---|---|
| 1 | Juan Manuel Fangio | 31 (37) | ||
| 2 | Alberto Ascari | 25 (28) | ||
| 3 | José Froilán González | 24 (27) | ||
| 4 | Nino Farina | 19 (22) | ||
| 5 | Luigi Villoresi | 15 (18) | ||
| Source:[6] | ||||