A dreadnought on tracks.
Never again will I be stuck in traffic, the only problems I'd have would be choosing whether to drive over obstacles or to blow them to smithereens.
Alternatively a steampunk-themed car that makes a satisfying 'PrrrtThupt-sound' when starting the engine.
Imagine this baby with wood and brass trims and a steam exhaust. As well as some cool dude with goggles driving it.
The exhaust doubles as smokescreen, along with that there would be a flame-thrower and a set of 5 small missiles ready for attack behind the grill.