The lightning isn't very good, the render quality and framing can both be a lot better.

I suggest to move the light between the car and the camera (or behind the camera) and not behind the car (which makes every detail blurry). Furthermore you could move the camera a bit so the framing is better...

You have a start here but IMHO that is just it.... sorry to sound very harsh but I hope you take what I said positive and make the necessarily changes (you still have time) and it isn't that much work / time you need for it. They are all technical matters and have nothing to do with the modelling itself.

thanks robvdn but this light is not behind the car i put this light on purpose this light is under the car
in my textured image the light is not so exposed and the light under the var is yellow because the car is orange but i changed the light color to white because it is a clay render
but really thank for taking from your time telling me that

It seems a bit dark on the bottom, but the shape and positioning are really good!

thank you mossyB but as i said i made that way because it is a clay render so i want the standard material to look like a car paint shader

But when the tires just look like black shapes, you've then overdone it...
The undercarriage light is a nice touch, but the tires are still just black shadows.

Very nice done ...

It looks a lot better in HiRes. Really dark when you are looking at it here. But in HiRes you can see the details better. Nice job.

thank you downoffthedragon

take a look to the textured model the rims are clearer than this

i am saying that to you downoffthedragon because you have told me abouy the hi-res image

i made chrome rims to be clear

good clean modeling gl

thanks rumi

Lovely work author! Nicely done!