I think having the car straight on from the side kinda hurts the image.
Maybe something from a different angle might give it something.
Hope you don't mind me posting a photo but this is what I mean...
BK1_5070-Edit by Brian Konstantinou, on Flickr
Mine wasn't shot with a rig. I shot this hanging out the passenger door while my brother was at the wheel :^)
Yeah that's what I meant by car to car