The first pic I cut the car on to a new layer, played with the colour values and sharpness. I then desaturated the background, added some blur and darkness to it to help the car stand out.
The 2nd pic, On the car I played with saturation, brightness and contrast, over sharpened it to emphasis the car's lines and and reflections. I then added a slight blur to forground and desaturated the enviroment a bit. The blur in that pic is just from panning with it as it drove in front of me. I used a slightly longer shutter than you'd usually use and just the panning right on (Through luck and multiple pictures, not skill haha )
Hope this helps