I don't think of HDR as a novelty. Processed correctly, one can achieve great results from them. The problem with shooting automobiles is the reflections: you have to be careful of your surroundings. In his case, the harsh reflections of the sun are very distracting which also takes away from the vehicle's beautiful shape.
The second problem I see is in the post processing. The image is on the flat side and the color temperature is too warm which doesn't help in color separation.
You have a lot of detail in your images -- don't be afraid to push the PP on them to make your images more dramatic.
Nikos
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