That depends on what obstacles you face in Project Zomboid. A commercial or performance vehicle is your best bet if you have many miles to cover and the roads are clear. They go fast, and you'll cover distance quickly as long as you stay on the roads. If you're looking to go off-road, get a heavy-duty vehicle. The penalty for leaving the road won't be so steep, and you won't damage the vehicle every time you drive into a ditch.