It looks like a great start.
Now since you asked for for comments and criticism, here is my constructive criticism:
The car seems too much like a box right now. Here is a nice side veiw of the car. (I hope its the right car, it says it is.)

Image from:
http://www.4tuning.ro/wallpaper_gallery ... m=78&pos=2
image url =
http://www.4tuning.ro/wallpaper_gallery ... 80x960.jpg
If you match more of the curves, it will look even better than it does now.
The only other thing I see is that you need to widen the car a little bit. It doesnt look like its in proportion compared to the picture here:

Image from:
http://www.invictacar.com/images/gallery/D35857-8.jpg
I think if you referance those two images you should be able to make an outstanding model of the car. Your off to a great start though

!
EDIT: It took me over an hour to write this post!? I started before your last one jonas

. Are you finished modeling it now? I posted the above using the phrase "great start" because I thought you were still going to modify it more before texturing and finishing it up. I do not mean to demean your work with that comment, I was under the impression that more was going to be done.
EDIT EDIT: If any part of this post doesnt make sense, I am sorry. Its currently 1:07 a.m. where I live and I am tired.
Think outside the box.
To go on an adventure, one must discard the comforts and safety of the known and trusted.