the whole car looks distorted compared to the backdrop you putted it into
rims strenghten that image pretty much since they are bent in, making the car stand out as the car is straight compared to rest of crooked perspective objects
the reflections on the car are from totally different surrounding compared to this picture
the car has showroom based lighting and reflections, which stand out easily from natural picture
also there is something weird looking on the dimensions of the car, but i cant find it right now
some good ideas and stuff in to there but as whole it has loads of stuff to fix on it too