The Car is the earliest alternate form of transportation for the player. Although it requires a bit of fuel, driving a Car is much faster than running, letting you scout out areas or outmaneuver biters. Cars also have a built-in turret (which requires ammo), plenty of storage, and some armor, letting the player use hit-and-run tactics against small groups of enemies.
As of update v0.11, cars will collide with objects - dealing and taking damage in the process. The damage is dependent on the car's speed and the health of the target; small biters and trees can be safely rammed, but colliding with big biters and Walls can easily destroy the vehicle and its contents.
Use for Storage
There is an thread about the old sprites of the car. It includes also the old graphics and how to replace it in game.
These are the default bindings. They can be changed in the Options menu.