The 1991–92 season was the club's 34th season in the
Turkish First Football League. It was also one of the club's most successful seasons. They won the Turkish First Football League for the 10th time in team history and their 3rd consecutive title setting a franchise record, as well as a shared league record then, however
Galatasaray broke this record 8 years later by winning 4 consecutive titles (1996–2000). Beşiktaş set another league record by finishing the league undefeated, with 23 wins, 7 draws and 0 losses. They also continued their record setting unbeaten streak from last year making a total of 35 games unbeaten. Also a league record. The team was considered "legendary" due to all the milestones achieved that season. In the Turkish cup, Beşiktaş defeated
Aydınspor 1–0 in the quarterfinals, but lost to
Trabzonspor 1–2 in the semifinals. Trabzonspor would go on to win the cup. By finishing 1st last season Beşiktaş also qualified for the
European Cup. In the first round they were eliminated by
PSV Eindhoven 2-3 (1-1 at home and 1–2 away). Beşiktaş played Trabzonspor for the
Presidents Cup, after a loss to Trabzonspor in the semifinals of the Turkish cup, the team redeemed itself by defeating Trabzon 2–1. Beşiktaş missed the
TSYD Cup by 3 points. They beat
Fenerbahçe 4-1 but lost to Galatasaray 2–3.
European Cup
As the defending Turkish champions, BeÅŸiktaÅŸ qualified for the 1991-92 European Cup.
BeÅŸiktaÅŸ became the first team to finish 1st place undefeated. The team became "legendary" and is considered as one of the best teams in the history of Turkish football.