That depends largely on where you want to go. Downtown Dublin, about 6 miles from Dublin Airport (DUB), can be a bit tricky to drive in. Make it easy on yourself by reserving something small, fuel-efficient, and a cinch to handle. That being said, Dublin is an excellent base to explore some of the rocky coastlines around Ireland. If your vacation is more about tearing down the open road, then you may prefer something with a little more comfort and room to move about. How about a full-size car or a standard SUV?