During the remainder of 1948, the 166 Spyder Corsa went on to achieve an impressive selection of results in monoposto trim, even though it was frequently up against purpose-built single seaters,

Highlights included victories in the Coupes des Petites Cylindrees Formula 2 race at Reims (Raymond Sommer for Scuderia Ferrari in either 008 I or 014 I) and at the Bari Formula 2 Grand Prix (Chico Landi for the Besana brothers in 002 C).

There were half a dozen second place finishes too: at the Apertura Formula 2 Grand Prix in Vercelli (Bruno Sterzi for Scuderia Inter in 010 I), the Stockholm Formula 2 Grand Prix (Clemente Biondetti for Scuderia Ferrari in 006 I), the Coppa Nuvolari Formula 2 race at Mantova (Franco Cortese for Scuderia Ferrari, probably in 008 I), the Napoli Formula 2 Grand Prix (Soave Besana in 002 C), the Firenze Formula 2 Grand Prix (Clemente Biondetti for Scuderia Ferrari, probably in 008 I) and the Circuito di Garda Formula 1 race (Bruno Sterzi in 018 I for Scuderia Inter).

The 166 Spyder Corsa also claimed a brace of third place finishes in monoposto events. These came at Roussillon Formula 2 Grand Prix and the Grand Prix de Nations Formula 1 race in Geneva (on both occasions with Raymond Sommer driving chassis 010 I for Scuderia Ferrari).

In sports car racing, the undoubted highlight of 1948 was victory in the Paris 12 Hours at Montlhery for Luigi Chinetti and Peter Mitchell-Thompson (Lord Selsdon) in 016 I.

Other notable podium finishes included second at the Circuiti di Pescara (Bruno Sterzi for Scuderia Inter in 012 I) and third at the Coppa d’Oro delle Dolomiti (Soave and Gabriele Bessana in 004 I).

Outside of circuit and road races, the 166 Spyder Corsa took a memorable 1-2 finish at the Vernicino-Rocco di Papa Hillclimb (the Coppa Galenga). Giovanni Bracco secured the top spot for Scuderia Ferrari in 012 I followed by team-mate Roberto Vallone in 008 I.