He subsequently moved to Serie B side Torino in 1989, helping the team to win the Serie B title that season, and to earn promotion to Serie A. The following season, he won the 1991 edition of the Mitropa Cup with Torino, and he helped his club to qualify for the UEFA Cup the next season by finishing the Serie A season in fifth place. During the 1991–92 season, Mussi led Torino to a third-place finish in Serie A, and he also helped his club to reach the UEFA Cup final, where they were defeated by Ajax on aggregate. During the 1992–93 season, Mussi won the Coppa Italia with Torino, but the team missed out on the 1993 Supercoppa Italiana.