I like that car. It seems to reach the standards of contemporary browser games.
(Take look at big point.com.)
Is it actually a shader or simply a setting of the material?
The skin for the upper parts of the car seems to be very small.
At least the front end between the lights could need more details.
The distorted frame of the car is exaggerated and doesn't look realistic.
You have to consider the core parts of the car which cant be deformed very much.
Maybe, you have to add polygons to get a realistic deformation.