Weapons vs vehicles

I was wondering how good are the basic utility weapons against vehicles, as in how much damage do they do to the player without actually hitting them. I’ve seen gameplay showing that the warthog is about as powerful as the Halo 3 warthog which is perfect. I hope the vehicles are quite strong against non power weapons so that you actually have to aim for the driver not just shoot the hell out of the vehicle. Anyone got some insight on this?