Ottorino Volonterio
Ottorino Volonterio was a racing driver from Switzerland. He was born in Orselina and was trained as a lawyer, before he began participating in sports car racing. He debuted in Formula One at the 1954 Spanish Grand Prix on 24 October 1954 in a Maserati 250F, but was not successful in the three World Championship Grands Prix he entered, and only finished the 15 laps behind the winner. Volonterio continued to compete in non-championship Formula One races and sports cars, with his best result a second place in the Coupe de Paris at Montlhéry in 1955. He continued racing until 1973, and died in Lugano in 2003.| Year | Entrant | Chassis | Engine | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | WDC | Points |
| 1954 | Baron de Graffenried | Maserati 250F | Maserati Straight-6 | ARG | 500 | BEL | FRA | GBR | GER | SUI | ITA | ESP
Ret * | NC | 0 |
| 1956 | Scuderia Centro Sud | Maserati A6GCM/250F | Maserati Straight-6 | ARG | MON | 500 | BEL | FRA | GBR
DNA | | | | NC | 0 |
| 1956 | Ottorino Volonterio | Maserati A6GCM/250F | Maserati Straight-6 | | | | | | | GER
NC | ITA | | NC | 0 |
| 1957 | Ottorino Volonterio | Maserati 250F | Maserati Straight-6 | ARG | MON | 500 | FRA | GBR | GER | PES | ITA
11 † | | NC | 0 |
