Mad Max Cars
The car which is hacked to death by the Toe-Cutters gang is a '59 Chevy Impala. The car was basically on the way to ruin before it was even used in the film, so don't you Chevy fans get too upset about it! The rusty water coming from the radiator is a good indicator of the general condition of the car.
Also note that the pipes on the hood are riveted on for looks only, see how they shake around when the car is attacked. In reality this car was only a 6 cylinder anyway.