[drunken monkey]

If you want to know, I didn't vote for number 4 because to me (and I mean no offence by this) it just looks like a Pantera with a body kit on it.
Remember, this is judged on the design, not who can draw better. As a design contest, 3 is in my view, the only one that does something that properly fits the brief. Put it this way; most of what you is about the actual drawing skill. Of this, as it is not part of the judging criteria, nothing needs to be said. The rest you talk about in the drawing is to do with the packaging of the car and not actually that hard to "fix" without changing the design. I mean, is it a design when you take car and change some features? To me, no. That is not to say that I don't think 3 is not the better drawing.