I mostly use AC3D for making cars for racing sims, or aircraft for flight sims.
Here is a look at the current batch of racers, all are medium poly models for sims rather than ultra high for renders. No wheels, as they are made seperate and placed by the game engine.
Firstly a Ford Escort Mk1.
Next, the 1967 BMW 2002. Headlights need to be remade.
then the Alfa Romeo GTA 1600.
and lastly the one thats in work at present, Jaguar Mk II
Most of these are under 5K polys. I can turn out one of these fairly simple shells in a couple of days. They look good in the game and render fast, keeping frame rates high.
BD F