I propose that huge speakers be placed underneath the car as well as in the back of it(not really to gain any thrust, but only to make sure that you can hear the music better). The next thing you'd do is convert your engine into a generator so you can support the larger electricity requirements needed by the speakers. You could do away with the wheels altogether this way by simply allowing the car to vibrate on the ground to the intense low-frequency tones created by the speakers.

Now all you'd have to do is get someone to give your car a big push and off you'd go. How would you control it, you ask? Who cares? You've got a sorta-stylishly-looking car(thanks to the blurriness created by the vibrations) with enough bass power to keep you moving and grooving all-day long. (For road use only)