Blenderpedia presents a 50 minute videotutorial on car modeling.
Rob Tuytel writes:
In this tutorial I’m explaining how to create a car. There is a lot of interesting stuff in this video, i'm explaining how to create a random shape, the wheels and a lot of more things. Like always, i'm analyzing my model and not modeling every singel part, just to keep tutorial watching fun :)
And of course an open blend file with free textures to experiment ( 100% free ).