For 1991 he was signed by the ambitious Scuderia Italia team, financed by Beppe Lucchini with a Dallara chassis, Judd V10 engines and Emanuele Pirro in the second car. Due to poor results in 1990 the cars had to prequalify but soon established themselves as decent midfield runners. In the wet San Marino Grand Prix Lehto impressed by lasting in a race of attrition to finish 3rd, scoring his first F1 points. He impressed elsewhere but did not score again through poor reliability and bad luck (only finishing on four other occasions). He stayed with the team in 1992, now paired with Pierluigi Martini and using Ferrari V12 engines but the new Dallara B192 chassis had severe handling problems. Lehto's best result was 7th at Spa, his worst a failure to qualify at the Hungaroring.