The M191 debuted in the 1991 United States Grand Prix, driven by Italians Pierluigi Martini and Gianni Morbidelli. Martini, a longtime stalwart of Minardi, scored all the points scoring finishes for the team in 1991, finishing fourth at the San Marino Grand Prix and repeating the feat in Portugal. This meant a finish of 7th place in the Constructors' Championship, the best placing Minardi achieved in the course of its history.