All available race results Guerrino Sostaro
| Date | Race | Rank |
| 19/10 | Giro di Lombardia | 38 |
Rider information for 1941
| Rank | 475 |
| Score | 10 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| 08/03 | Milano - Torino | 23 |
| 19/03 | Milano - Sanremo | 43 |
| 06/04 | Giro del Lazio | 31 |
| 03/05 | Giro di Toscana | 32 |
| 17/10 | Giro di Lombardia | 44 |
Rider information for 1942
| Rank | 245 |
| Score | 52 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | Individual |
No results available in season 1943.
Rider information for 1943
| Rank | 770 |
| Score | 0 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | U.S. Azzini |
No results available in season 1944.
Rider information for 1944
| Rank | 704 |
| Score | 0 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | U.S. Azzini |
No results available in season 1945.
Rider information for 1945
| Rank | 802 |
| Score | 0 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | U.S. Azzini |
No results available in season 1946.
Rider information for 1946
| Rank | 1212 |
| Score | 0 |
| Name | Guerrino SOSTARO |
| Country | Italy |
| Team | U.S. Azzini - Freni - Universal |