Speaking at a press conference on Tuesday, Pace said: "Success for me is being one of big six clubs [in Spain], that would be great, that's success, being in the top six," he said.
"If we can then win more than that, it would be a dream as well. If you have the mentality that our place is among [the big clubs], that we're equals to them, that's success. We want that change of mentality. We're not here to change Espanyol, but to help it grow with humility and to invest in the youth academy and infrastructure. But Espanyol must preserve its independence and its identity.
"My problem is my dreams are big. My dream is for everyone to realise this is a great club, a special part of Barcelona and the world of football. We have to show that there are some things here that aren't found elsewhere.
"My ambition will outlast me. If anything happens here, I would love for this club, any club that I am associated with, to win Champions League. But it's an ambition. It may happen long after I'm dead, but we have to put plans in place and change the mentality [for that to happen]. We want winners."