Grand Prix
SummaryStatisticsTeamsPositionsTeam MatesYear by Year
| Name | Leonhard Joa |
| Country |  Germany |
| Place of Birth | Carlsberg |
| Date of Birth | 23/12/1909 |
| Date of Death | 01/01/1981 |
| First Race | ADAC Eifelrennen 21/05/1939 |
| Last Race | Grosser Preis der Schweiz 20/08/1939 |
| Best Qualifying | 2nd – Grand Prix des Frontières 28/05/1939 |
| Best Result | 8th – (2 times) |
Maserati (1939)
| 8th | 1 Time |
| 10th | 1 Time |
| DNF | 2 Times |
| DNQF | 1 Time |
| DNA | 4 Times |
| Season | Team | Team Mate | Best Pos | Points | Wins | Poles | Position | Qualifying | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1939 | Maserati | Adolfo Mandirola | 8 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| Andrea Brezzi | 24 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | ||
| Arialdo Ruggeri | 19 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | ||
| Armand Hug | 8 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 2 | 1 | 2 | ||
| Carlo Bonomi | 24 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | ||
| Carlo Felice Trossi | 30 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | ||
| Carlo Pagliano | 30 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Catullo Lami | 24 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | ||
| Dioscoride Lanza | 24 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | ||
| Edoardo Teagno | 24 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | ||
| Emilio Romano | 19 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | ||
| Emmanuel de Graffenried | 17 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | ||
| Enrico Platé | 24 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | ||
| Ettore Bianco | 19 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | ||
| Franco Comotti | 24 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | ||
| Franco Cortese | 24 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | ||
| Giorgio Pelassa | 24 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | ||
| Giovanni Rocco | 19 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | ||
| Gualtiero Garagnani | 24 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | ||
| Guido Barbieri | 19 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 1 | ||
| Heinz Dipper | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 | 4 | 1 | ||
| John Wakefield | 9 | 1 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 4 | 0 | 4 | ||
| Louis Gerard | 9 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | ||
| Luigi Soffietti | 9 | 22 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | ||
| Luigi Villoresi | 8 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 3 | ||
| Marc Horvilleur | 17 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 2 | ||
| Marcel Contet | 17 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | ||
| Mario Venturelli | 30 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Max Christen | 19 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | ||
| Paul Pietsch | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 4 | ||
| Piero Taruffi | 19 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | ||
| Pino Baruffi | 30 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Raph (Georges Raphaël) | 19 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | ||
| Raymond Sommer | 9 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 3 | ||
| Reggie Tongue | 17 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | ||
| René Dreyfus | 19 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | ||
| Roberto Bonomi | 30 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| Roger Loyer | 8 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 2 | 1 | ||
| Secondo Corsi | 9 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 1 | 0 | ||
| T.A.S.O. Mathieson | 8 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | ||
