The chav!
Model: Saxos, Novas - or anything modified
The classic chav-mobile is a Saxo VTS or VTR. And of course there's the Vauxhall Nova. That's as chavvy as it gets. Also, any car with minor cosmetic improvements but nothing done to the engine because they can't afford the insurance. Anyone who customises the bodywork, but not the engine, is just a complete chav.