The rover has no special abilities except the ram and crush feature. The car can instantly ram the enemy and drive over it to make it lose health. This is mainly a bit controversial in my opinion, cause I've seen this in the Grand Theft Auto Series. But never mind the coltroversial-ness! Move on, we must! Allon-sy!
The rover, like the Jeep and other power-ups can support graphics. But in order for this to work, the Car graphics sheet must be used or else you graphic will be deformed. Some graphics will not look proper on the Rover, so be aware of that when you use graphics.