Thanks for comments !
Erik_S, I agree with you about the 2nd render of my previous post, that's the reason why I've changed the studio setup to what you can see below as 1st render.
No, I'm not using Vray but YafRay, a free renderer nicely integrated with Blender. About the poor quality shadows, it's just because I lowered quality settings to save some render time. You can expect kickass renders for final entry
IceKid84, I understood your point about interior width. It's just it's really small that makes it so wide. For example, a seat is only 47 cm wide. And the steering wheel is maybe too small at the moment, 24cm !
willi_44 (hi men

) I know about the studio setup so I worked on it. The leather needs work, I agree with you.
Update. As the contest deadline is really close, I spent some hours trying to find a good render style. I also added some stuff to the car. Todolist is still long