This GLOCK vs. Jeep video is going to show how well even handgun rounds can do against an unarmored vehicle with the use of multi-calibers in this live fire demonstration.
Very surprising penetration from Full Metal Jacket pistol rounds, being able to travel, in most cases, right through the front seats. This is exactly why law enforcement and military wear body armor in what is termed “soft-skinned vehicles”; tactical speak for unarmored every day trucks, vans and cars.
Modern firearms, especially rifles, with FMJ or armored piercing rounds will make swiss cheese of any normal vehicle so there is no real protection from hiding behind car doors or side panels. The only thing that may provide some level of protection is a big engine block. In many tactical training courses it is actually taught to get away from your vehicle if it is immobile or stuck due to enemy fire. The soft-skinned vehicle only acts as a giant magnet for the bad guys to focus their guns on.
This demo is always good to keep in mind as you never know when you will have to take cover in an emergency situation.