Is this a model car with a moving background to create the blur? Did you cut off the tires so as not to show the table it was sitting on? All in all, though, pretty realistic looking with effective lighting to make it look like outdoor light, even if not evenly lit throughout.
the green is a little distracting. I'm also not sure about cutting off the bottom of the tires, but I guess you didn't want the curb in the shot, however, it is advanced edditing, so if that is the case, I would have cloned the curb out. That's just my guess.
Is this a model? If so, you're a bloody genius, because I really can't tell - I only became suspicious because there are bugger all of these cars parked around grassy slopes for people to take pictures of... Did you try taking pictures of it after someone gave it a push? Lighting is very stylish, and I think it fits the challenge well enough... 9.
Motion blur doesn't work for me at all here, as it is curved. Also, the wheels on the car are not blurred, so I don't the impression of any speed at all. I don't like the crop... the wheels look unintentionally chopped off. The car doesn't seem very sharp. Sorry to be so down on you, as it was a great idea, and I really like the graduated green.
This photo has some nice blur effect. The problem is that the wheel blur should be in conjunction with the blur of the background in a pan shot like this :) The lack of surface also creates a tad of undue tension... = 5