Serie A competition duration: Inter Milan won 20 championships in 1993, Juventus won 36 championships in 1992, Milan won 19 championships in 1991,

Serie A competition time ranking:

1, Inter Milan, 93 seasons, 20 championships, 36 championships, 6}2, Juventus, 92 seasons, 3 championships, 6}3, Roma, 92 seasons, 3 championships, 6}4, Milan, 91 seasons, 19 championships, 6}5, Fiorentina, 88 seasons, 2 championships