That was such a disappointing Euro final. Steaua played some very good collective football in their earlier games. Watching those games compared to Milan's and you would have expected a competitive, exciting game, but Milan had hit top form at the right time in their semi against Madrid and carried that over, while, as Sjor says, Steaua looked physically hopeless and crumbled under the occasion.
They did have form for that with the flat games against Benfica ( rewatched those fully recently after Bepo's Mozer comps) in the previous semi-finals, and their final win. They choked in that one too, opting for all-out defence, despite decisively beating a good Anderlecht team in the semi-final, who were imo at least as strong than that version of Barca. I think that's one of the few times a European Cup winner was comfortably overshadowed in performance by the winners of the other two trophies.
Dynamo Bucharest, who made up essentially the other half of the Romanian team, also stumbled at the late stages at that time in the Cup-winners cup. They lost the semi-final against Anderlecht (not quite as strong by this time ) with a tame away performance after being very unucky in the home game. It's interesting looking at that period for those clubs, as those big game performance struggles and mental issues (including the 3-0 away loss against Denmark when they were almost qualified for 1990, which they rebounded from to win 3-0 in the decisive final game return) clearly forged the national team into a very mentally resilient, calm side over the next decade; this after a long time of being nearly-men with a reputation for choking in vital away qualifying games.