Career
He entered a Formula One race in 1952 as reserve driver for Scuderia Ferrari. But as all the Ferrari drivers started the race, Sighinolfi could not. He never participated in Formula One again.
He did however enter 37 sports car races between 1948 and 1955, his best results being two victories, three second-place finishes and two third-place finishes.
He died at the age of 31 the day after crashing into a truck, driving a Ferrari prototype, in San Venanzo, between Modena and Maranello.