| Type: | NC |
| Country: | Italy |
| Grand Prix: | Naples |
| Official Name: | VIII Gran Premio di Napoli |
| Location: | Posillipo Circuit, Posillipo, Naples |
| Date: | 8 May |
| Year: | 1955 |
| Course: | Street circuit |
| Course Length: | 2.55miles |
| Distance Laps: | 60 |
| Distance Length: | 152.86miles |
| Pole Driver: | Alberto Ascari |
| Pole Country: | ITA |
| Pole Team: | Lancia |
| Pole Time: | 2:08.1 |
| Fast Driver: | Jean Behra |
| Fast Team: | Maserati |
| Fast Time: | 2:09.4 |
| Fast Country: | FRA |
| First Driver: | Alberto Ascari |
| First Country: | ITA |
| First Team: | Lancia |
| Second Driver: | Luigi Musso |
| Second Country: | ITA |
| Second Team: | Maserati |
| Third Driver: | Luigi Villoresi |
| Third Country: | Italy |
| Third Team: | Lancia |
The 8th Naples Grand Prix was a motor race, run to Formula One rules, held on 8 May 1955 at Posillipo Circuit, Naples. The race was run over 60 laps of the circuit, and was won by Italian driver Alberto Ascari in a Lancia D50.[1] [2]
| Pos | No. | Driver | Entrant | Constructor | Time/Position | Grid | |
|---|---|---|---|---|---|---|---|
| 1 | 6 |  Alberto Ascari | Scuderia Lancia | Lancia D50 | 2:13:03.6 110.93 km/h | 1 | |
| 2 | 16 | Luigi Musso | Officine Alfieri Maserati | Maserati 250F | 2:14:20.6 (+77.0s) | 2 | |
| 3 | 12 | Luigi Villoresi | Scuderia Lancia | Lancia D50 | 59 laps | 4 | |
| 4 | 2 |  Jean Behra | Officine Alfieri Maserati | Maserati 250F | 55 laps | 3 | |
| 5 | 8 | Giorgio Scarlatti | Giorgio Scarlatti | Ferrari 500 | 54 laps | 6 | |
| 6 | 4 | Berardo Taraschi | Berardo Taraschi | Ferrari 166 | 53 laps | 7 | |
| 7 | 14 |  Ottorino Volonterio | Ottorino Volonterio | Maserati A6GCM | 47 laps | 9 | |
| Ret. | 10 |  Roberto Mieres | Officine Alfieri Maserati | Maserati 250F | 23 laps - oil leak | 5 | |
| Ret. | 18 |  Ted Whiteaway | E.N. Whiteaway | HWM-Alta | 17 laps - engine | 8 |