It would be difficult to do this any better than you have done.
I am not to thrilled by the composition, but the light and tone is excellent. Good job!
I agree with Charles. Out of each car photo this is the strongest. This is also the only photo where you seem to isolate something.
Here is a suggestion, I am not critiquing this photo. Get down. Each of these were shot at a down angle. If you got lower I think the compositions would be better. Then think about what drew you to the car. If it was the line then accentuate the the line.