The Tangerines are up against the League One champions at their home of Ibrox in the final four cup fixture but despite Ally McCoist's men likely to have plenty of home support, McNamara feels they can produce a winning result.
"Regardless of who we are playing if we play to our capabilities then we can win," he said.
"There is expectation on us as well, we know that.
"But if you look at the Rangers team they are more experienced than us, they have had more games like this in their careers.
"Rangers have only lost two games all season and that was in extra time so they're a team used to winning every week."
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