The modelling is good, but I really don't like your front- and rear skirts. If you ask me it's way to much to suit the car.
You should keep your tuning in the style of the car, and don't try to make it look more modern, as I think you tried to do with your skirts.
I think the car would look way better if you just lowered it and added some skirts that suit the car. Also I think it would look better if you widened the wheelarches.
Something like this here, only without the racing stuff.
And I think your headlight is too dark.