in xna it works quite good with an acceptable framerate (without texture but the texture is not really good and detailed...)
the plastik look is because it was the first time that i textured something in max
and i think that 5k polys are a little bit to few...maybe for a car this is enaough because there are all technical parts behind the case but here for example the engine and some other parts who are very complex are visible

@broozar: you are right. i have modeled nearly every bolt and when i started it i made it for a screensaver or something else and not for a game. this idea came later.