Hi !
I done this renders recently.
Model is not mine !
Render : KeyShot3
Postpro : Photoshop
I’m waiting to see what you think !
I like the motion blur on the first image and the env on the second looks awesome 
but Im not sure if the env in reflecting into the car.. What render engine have you used? internal I suppose because of the motion blur...or.. I dont know if it`s possible in cycles too :-?
anyways
Nice renders overall
Car is reflecting enviro, but I wanted it to pop up a little more.
I said before that i used KeyShot 3 for rendering and photoshop for compositing.
Blur is made in VirtualRig Studio .
Thanks for comment 
Oh sorry, I missed that part 