"We have a better chance of winning the Champions League than we had last year," he said.
"We have new players and more players with quality. We have played five games so far and won them all. Everything is in place for us now, so why not? I think we can win it."
After hitting the winner against Sporting Lisbon on Tuesday night, Ronaldo also remarked: "It is always important to score.
"I am working hard to try and better what I achieved last season.
"My confidence is high and I have five goals in the Champions League already - but I want more."