Well that depends on where you plan to wander. Downtown Trieste, about 19 miles from Trieste Airport (TRS-Friuli Venezia Giulia), can be a little tricky to drive around. Keep things easy by renting something compact, fuel-efficient, and simple to operate. That being said, Trieste is a handy base from which to explore many of the cliffs around Friuli Venezia Giulia. If your vacation is more about cruising down highways, you may want something with more trunk space and room to move around. How about a full-size car or a standard SUV?