Dario Ambrosini
Dario Ambrosini was an Italian Grand Prix motorcycle road racer who competed for the Benelli factory racing team. He finished second to Bruno Ruffo in the inaugural FIM 250cc world championship in 1949. He returned in 1950 and claimed the 250cc world championship with three victories including one at the 1950 Isle of Man TT. Ambrosini was killed during official practice for the 1951 French Grand Prix at Albi.1949 point system
| Position | 1 | 2 | 3 | 4 | 5 | Fastest lap |
| Points | 10 | 8 | 7 | 6 | 5 | 1 |
Points system from 1950 to 1968
| Position | 1 | 2 | 3 | 4 | 5 | 6 |
| Points | 8 | 6 | 4 | 3 | 2 | 1 |
5 best results were counted up until 1955.
| Year | Class | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Points | Rank | Wins |
| 1949 | 250cc | Benelli | IOM
NC | SUI
2 | ULS
- | NAT
1 | | | | | 19 | 2nd | 1 |
| 1950 | 250cc | Benelli | IOM
1 | SUI
1 | ULS
2 | NAT
1 | | | | | 24 | 1st | 3 |
| 1951 | 250cc | Benelli | ESP
- | SUI
1 | IOM
2 | BEL
- | NED
- | FRA
| ULS
- | NAT
- | 14 | 3rd | 1 |
