# Grand Prix moto des Nations 1951

Le Grand Prix moto des Nations, connu également sous le nom de Grand Prix d'Italie 1951 est le huitième rendez-vous de la saison 1951 du championnat du monde de vitesse. Il s'est déroulé sur l'Autodromo Nazionale di Monza du 7 au 9 septembre 1951.
C'est la 29e édition du Grand Prix moto des Nations et la 3e édition comptant pour le championnat du monde.

## Classement final 500 cm$^3$

| Pos. | Pilote | Moto | Temps/Écart | Points |
| 1 | Alfredo Milani | Gilera | 1 h 11 min 24 s 3 | 8 |
| 2 | Umberto Masetti | Gilera | +48 s 8 | 6 |
| 3 | Nello Pagani | Gilera | +49 s 9 | 4 |
| 4 | Geoff Duke | Norton | +1 min 07 s 5 | 3 |
| 5 | Bruno Ruffo | Moto Guzzi | +1 min 27 s 6 | 2 |
| 6 | Bill Doran | AJS | +1 min 32 s 1 | 1 |
| 7 | Libero Liberati | Gilera | +1 min 56 s 6 | |
| 8 | Jack Brett | Norton | +1 tour | |
| 9 | Carlo Bandirola | MV Agusta | +1 tour | |
| 10 | Reg Armstrong | AJS | +1 tour | |
| 11 | John Lockett | Norton | + 2 tours | |
| 12 | Ray Amm | Norton | +2 tours | |
| 13 | Dante Bianchi | Moto Guzzi | +2 tours | |
| 14 | Giuseppe Colnago | Gilera | +2 tours | |
| 15 | Bill Petch | AJS | +2 tours | |
| 16 | Giulio Galbiati | Moto Guzzi | +4 tours | |
| 17 | Facchinetti | Gilera | +4 tours | |
| Abd. | ... | ... | Abandon | |

## Classement final 350 cm$^3$

| Pos. | Pilote | Moto | Temps/Écart | Points |
| 1 | Geoff Duke | Norton | 57 min 29 s 9 | 8 |
| 2 | Ken Kavanagh | Norton | +0 s 5 | 6 |
| 3 | Jack Brett | Norton | +40 s 8 | 4 |
| 4 | Bill Doran | AJS | +1 min 20 s 4 | 3 |
| 5 | Reg Armstrong | AJS | +1 min 20 s 4 | 2 |
| 6 | Rod Coleman | AJS | +1 min 21 s 1 | 1 |
| 7 | Leslie Graham | Velocette | +1 tour | |
| 8 | Tommy Wood | Velocette | +1 tour | |
| 9 | Bill Petch | AJS | +1 tour | |
| 10 | Ray Amm | Norton | +1 tour | |
| 11 | Bob Matthews | Velocette | +1 tour | |
| 12 | Roland Schnell | Parilla | +1 tour | |
| 13 | Humphrey Ranson | AJS | +2 tours | |
| Abd. | ... | ... | Abandon | |

## Classement final 250 cm$^3$

| Pos. | Pilote | Moto | Temps/Écart | Points |
| 1 | Enrico Lorenzetti | Moto Guzzi | 52 min 34 s 6 | 8 |
| 2 | Tommy Wood | Moto Guzzi | +0 s 8 | 6 |
| 3 | Bruno Ruffo | Moto Guzzi | +1 min 47 s 7 | 4 |
| 4 | Alano Montanari | Moto Guzzi | +1 min 56 s 9 | 3 |
| 5 | Bruno Francisci | Moto Guzzi | +2 min 07 s 9 | 2 |
| 6 | Guido Paciocca | Moto Guzzi | +2 min 34 s 6 | 1 |
| 7 | ... | ... | | |

## Classement final 125 cm$^3$

| Pos. | Pilote | Moto | Temps/Écart | Points |
| 1 | Carlo Ubbiali | FB Mondial | 44 min 26 s 2 | 8 |
| 2 | Romolo Ferri | FB Mondial | +51 s 4 | 6 |
| 3 | Luigi Zinzani | Moto Morini | +1 min 02 s 9 | 4 |
| 4 | Cromie McCandless | FB Mondial | +2 min 07 s 1 | 3 |
| 5 | Otello Spadoni | FB Mondial | +2 min 27 s 5 | 2 |
| 6 | Giuseppe Matucci | MV Agusta | +2 min 27 s 8 | 1 |
| 7 | Vittorio Zanzi | Moto Morini | +1 tour | |
| 8 | Felice Benasedo | FB Mondial | +1 tour | |
| 9 | Franco Bertoni | MV Agusta | +1 tour | |
| 10 | Emilio Mendogni | Moto Morini | +1 tour | |
| 11 | Georges Burggraf | MV Agusta | +3 tours | |
| 12 | Rosati | MV Agusta | +4 tours | |
| 13 | W. Zylaad | MV Agusta | +4 tours | |
| Abd. | ... | ... | Abandon | |

## Classement final side-car

| Pos. | Pilote | Passager | Moto | Temps/Écart | Points |
| 1 | Albino Milani | Giuseppe Pizzocri | Gilera | 42 min 01 s | 8 |
| 2 | Eric Oliver | Lorenzo Dobelli | Norton | +0 s 4 | 6 |
| 3 | Peter 'Pip' Harris | Neil Smith | Norton | +1 tour | 4 |
| 4 | Hans Haldemann | Josef Albisser | Norton | +1 tour | 3 |
| 5 | Jacques Drion | Bob Onslow | Norton | +1 tour | 2 |
| 6 | Jean Murit | André Emo | Norton | +1 tour | 1 |
| 7 | Marcel Masuy | Denis Jenkinson | Norton | +1 tour | |
| 8 | Guido Galbiati | Zabini | Moto Guzzi | +1 tour | |
| 9 | Renato Prati | Marino Saguato | Moto Guzzi | +2 tours | |
| 10 | Fritz Mühlemann | Marie Mühlemann | Norton | +2 tours | |
| 11 | Jean Debotze | ... | Norton | +3 tours | |
| 12 | Henry Meuwly | ... | Gilera | +3 tours | |
| 13 | Jakob Keller | Gianfranco Zanzi | Gilera | +4 tours | |
| 14 | Roberto Besana | ... | ... | +5 tours | |
| Abd. | ... | ... | ... | Abandon | |