I agree with most of the above posters. The car is gorgeous, and really shows off your technical skills (as well as your ability to interpret a source into a vector-based medium--which, as I'm sure you know, is harder than it may sound
).
That being said, I think that bermuda hit the nail(s) on the head. I'm looking forward to seeing the revisions that you'd mentioned.
Overall, great job! I think that if you incorporate
some of these suggestions into your own vision and with your own (obvious) talents you'll have some serious portfolio-worth material.