There are rankings of R1 programs (like those at
www.phds.org) based on surveys of faculty . These surveys are pretty good at identifying top programs but are pretty much useless for anything beyond the top 30 or so.
A better way to tell what tier a program is to bump around it's website and look at the faculty and resources.
Top programs will have plenty of dynamic faculty and amazing resources (not one but several wind tunnels *heavy sigh*). The few less active faculty will be old lions full of honors and organizational responsibilities (president's committee on such and such, director of the international organization of blah blah...) .
Bottom programs will have only a few active faculty, the rest will be just counting the days till they can sail away with a full pension. Teaching loads will be heavy and resources scarce (you want a wind tunnel, kid? *put your lips together and blow*).