The FA1G was an evolution of the 1984 Osella FA1F, both designed by Guiseppe Petrotta. It differed from its predecessor primarily through a number of technical modifications – the extended wheelbase, redesigned radiators and rear diffuser. The FA1G used the 1.5-litre eight-cylinder turbo engine from Alfa Romeo (the Tipo 890). The car was ready for the third round of the 1985 Championship, San Marino Grand Prix. In the 1986 season the Osella team raced the FA1G alongside older FA1F and new FA1H, all three being equally non-competitive. Piercarlo Ghinzani raced the 1986 full season and scored only one finish, 11th in the Austrian Grand Prix in FA1G.
| Season | Series | Event |
| 1986 | F1WC | USA GP |
| Driver | No. | Entrant |
| Piercarlo Ghinzani | 21 | Osella Squadra Corse |
| Scale | Manufacturer | Collection |
| 1:43 | Tameo Kits | |
| Cat. No. | Quality | Rarity |
| TMK45 | 
| 
|
formula143 