The 1955 Gran Premio del Valentino was a non-championship Formula One motor race held on 27 March 1955 at the Parco del Valentino in Turin. The Grand Prix was won by Alberto Ascari driving a Lancia D50; Ascari also set pole position. Roberto Mieres in a Maserati 250F finished second and Luigi Villoresi in a Lancia D50 was third. Maserati driver Jean Behra set fastest lap.