Hi, I moved your topic to WIP section since it does not really look like a finished work. However please do not get discouraged! I will be happy to provide you with some feedback, and I am also sure that some other users will help you.
1. The scene is basically a car standing on a road. That's not really interesting. I would suggest you to take a look at some commercial car ads and note what kind of steps are made to make an image more intriguing. Maybe more contrasty lighting - like a setting sun? Maybe a lighting in the background? Maybe the whole scenery should be in the middle of a storm?
2. Materials - they look ok, but could be better. How about some dirt on the carpaint and tires? Here are 2 great tutorials on carpaint:
3. The position of the car - it's literally turning it's back on us. :) Maybe some different pose + different camera angle + different framing would work better?
