All available race results Siro Magagnini
| Date | Race | Rank |
| Giro d'Italia | ||
| 19/05 | Stage 3 | 8 |
| 20/05 | Stage 4 | 39 |
Rider information for 1927
| Rank | 763 |
| Score | 12 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| 07/04 | Giro del Piemonte | 13 |
| 28/04 | Giro di Toscana | 2 |
| 23/06 | Milano - Modena | 6 |
| 21/07 | Predappio - Roma "Coppa del Duce" | 12 |
| 13/10 | Campionato d'Italia su strada | 10 |
Rider information for 1929
| Rank | 109 |
| Score | 279 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| 04/05 | Giro di Toscana | 7 |
Rider information for 1930
| Rank | 233 |
| Score | 107 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |
No results available in season 1931.
Rider information for 1931
| Rank | 543 |
| Score | 22 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| 20/03 | Milano - Sanremo | 28 |
| Giro d'Italia | ||
| 14/05 | Stage 1 | 85 |
| 15/05 | Stage 2 | 65 |
| 17/05 | Stage 3 | 15 |
| 18/05 | Stage 4 | 43 |
| 20/05 | Stage 5 | 51 |
| 22/05 | Stage 6 | 65 |
| 24/05 | Stage 7 | 54 |
| 26/05 | Stage 8 | 45 |
| 28/05 | Stage 9 | 65 |
| 30/05 | Stage 10 | 7 |
| 01/06 | Stage 11 | 49 |
| 03/06 | Stage 12 | 33 |
| 05/06 | Stage 13 | 46 |
| 05/06 | General Classification | 42 |
Rider information for 1932
| Rank | 217 |
| Score | 126 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| 02/07 | Giro del Veneto | 16 |
Rider information for 1939
| Rank | 1041 |
| Score | 4 |
| Name | Siro MAGAGNINI |
| Country | Italy |
| Team | Individual |