TLDR: There are too many variables to call a definite yes or no, but any rifle from a .223 on up at a distance of 100 yards or less stands the best chance of penetrating a typical vehicle. This is a good time to mention my disclaimer.
It makes sense that characters hiding from gunfire would choose to skirt death by taking shelter in or against a car or truck. But how well do everyday vehicles, such as the kind you whittle away your life inside stuck in traffic, stop bullets? Much depends on the firearm, the ammunition and the make of the vehicle, so the answer isn’t going to be concrete. Here’s my shot at filling in the Swiss cheese.
