The two clubs meet in Madrid tomorrow night.
"Both teams have an equal chance of winning," Oriali told Sky Italia television.
"We reached the Final thanks to great performances, good football and beating teams who had been tipped to win the Champions League.
"Bayern got here through results against prestigious sides like Manchester United and Olympique Lyonnais, but also scraping through the keyhole against Fiorentina with those debatable refereeing decisions.
"However, we know the Germans, they never say die and will fight to the end for a victory."