Welcome to the forum.
Watch your backgrounds, as well as your photo being very cluttered to the side and behind the car (there's a door and spade handle growing out of the roof of the car). You've also got a lot of reflections and quite harsh shadows, because the photograph was taken in bright sunshine.
Digital Camera magazine did a car photography feature a little while ago, but I can't remember which edition it was in, but there are some automotive photography tips here
http://www.digitalcameraworld.com/20...ike-a-ferrari/
Hope this helps.
Nick