Well I haven't checked all cars since I don't have access to all of them. But the engine bays that are visible on the cars I have checked from Ferrari, Lamborghini and McLaren seem to be badly modelled. I can just about accept that since they require so much modelling, that it is best used elsewhere. The varying levels of detail on the cars is mainly apparent in the modelling of the rims, lights, exhausts and manufacturer badges. Ranging from excellent to awful. This was something that plagued GT5 and 6's models. I think it is down to varying degree of skills of each modellers working at Polyphony Digital. Whereas Driveclub's car models seem more consistent in their quality. I will post some more pictures soon.