| Type: | WMC |
| Grand Prix: | Italian |
| Date: | 6 Sep |
| Year: | 1925 |
| Official Name: | V Gran Premio d'Italia |
| Country: | Italy |
| Flag Suffix: | 1861 |
| Race No: | 4 |
| Season No: | 4 |
| Location: | Monza, Italy |
| Course: | Autodromo Nazionale di Monza |
| Course Mi: | 6.21 |
| Course Km: | 10.00 |
| Distance Laps: | 80 |
| Distance Mi: | 496.8 |
| Distance Km: | 800 |
| Pole Driver: | Emilio Materassi |
| Pole Country: | Italy |
| Pole Flag Suffix: | 1861 |
| Grid From Number: | True |
| Fast Driver: | Pete Kreis |
| Fast Team: | Duesenberg |
| Fast Time: | 3:36.7 |
| Fast Country: | USA |
| Fast Flag Suffix: | 1912 |
| First Driver: | Gastone Brilli-Peri |
| First Team: | Alfa Romeo |
| First Country: | Italy |
| First Flag Suffix: | 1861 |
| Second Driver: | Giuseppe Campari |
| Second Team: | Alfa Romeo |
| Second Country: | Italy |
| Second Flag Suffix: | 1861 |
| Second Driver2: | Giovanni Minozzi |
| Second Country2: | Italy |
| Second Flag Suffix2: | 1861 |
| Third Driver: | Meo Costantini |
| Third Team: | Bugatti |
| Third Country: | Italy |
| Third Flag Suffix: | 1861 |
The 1925 Italian Grand Prix was a combined Grand Prix and Voiturette motor race held at Monza on 6 September 1925. The voiturettes competed for their own trophy.[1] It was the final race of the 1925 AIACR World Manufacturers' Championship season.
| Pos | No | Driver | Car | Laps | Time/Retired | |
|---|---|---|---|---|---|---|
| 1 | 14 |  Gastone Brilli-Peri | Alfa Romeo P2 | 80 | 5h14m33 | |
| 2 | 5 | Giuseppe Campari | Alfa Romeo P2 | 80 | 5h33m30 | |
| Giovanni Minozzi | ||||||
| 3 | 19 | Meo Costantini | Bugatti 39 * | 80 | 5h44m40 | |
| 4 | 7 |  Tommy Milton | Duesenberg 122 | 80 | 5h46m40 | |
| 5 | 10 | Pete DePaolo | Alfa Romeo P2 | 80 | 5h48m10 | |
| 6 | 23 |  Ferdinand de Vizcaya | Bugatti 37 * | 80 | 5h50m49 | |
| 7 | 24 | Giulio Foresti | Bugatti 37 * | 80 | 5h55m18 | |
| 8 | 21 | Pierre de Vizcaya | Bugatti 37 * | 80 | 6h01m37 | |
| Ret | 22 |  Jules Goux | Bugatti 39 * | 64 | Fuel tank | |
| Ret | 1 | Emilio Materassi | Diatto GP | 39 | Mechanical | |
| Ret | 17 | Ettore Santoleri[2] | Chiribiri 12/16 * | 38 | Crash | |
| Ret | 6 | Alfieri Maserati | Diatto 20S | 38 | Mechanical | |
| Ret | 20 | Luigi Platé | Chiribiri 12/16 * | 13 | Mechanical | |
| Ret | 4 | Albert Guyot | Guyot Speciale GS25 | 8 | Mechanical | |
| Ret | 18 |  Ernest Eldridge | Eldridge Special * | 3 | Magneto | |
| Ret | 11 | Pete Kreis | Duesenberg 122 | 2 | Crash | |
| DNA | 2 | ? | Duesenberg 122 | Did not arrive | ||
| DNA | 3 | Albert Divo | Delage 2LCV | Did not arrive | ||
| DNA | 8 | Robert Benoist | Delage 2LCV | Did not arrive | ||
| DNA | 9 | ? | Rolland-Pilain | Did not arrive | ||
| DNA | 12 | René Thomas | Delage 2LCV | Did not arrive | ||
| DNA | 13 | ? | Rolland-Pilain | Did not arrive | ||
| DNA | 15 | Paul Torchy | Delage 2LCV | Did not arrive | ||
| DNA | 16 | ? | Alfa Romeo P2 | Did not arrive |
* Voiturette