just to ensure, I tested 5 cars that actually don't appear on tracciontrasera, on Polish Roads 2a and Factory's Test Track
starting with the Opel Astra OPC
drives very strangely for a FF car... first there's some oversteer, then there's very heavy understeer, like a 4WD with a heavy engine in front, plus the interior's not so good in terms of quality
then came the BMW X6
the car is much darker on the track then in the menus - i'm not into technical data of Racer so I don't know why, I only know it has misplaced lights in front, accelerates a bit too fast I believe, brakes a bit not good enough, and turns like crap, plus, while on the track, you can't see anything because the car's too dark
then there was the BMW e38 750iL
it brakes like crap, goes to 100km/h on first gear (I can't believe this is accurate), while the 4th gear seems to be too long, then it turns like crap (but what can you expect of a car this long), and also has a bit misplaced lights in front. By the way - has pretty good quality interior.
then, I got to the Dodge Charger R/T from 2007
this one was... well, best of worst. It drives like an american muscle should (meaning pretty much oversteer and massive traction problems), has pretty good quality interior (except for the steering wheel), has only 2 major problems - the sound (it starts to give a very loud wind sound while picking up speed) and the wheels falling into the surface.
finally, I tested the MB CL65 AMG, from the same authors as the X6, similiar problems - brakes and drives like crap, is much brighter in the menus than the actual track, altho this one has more or less correctly placed lights
well then, if someone wants a car that has a huge need of love and work on it - I can upload one of those 5 onto some public service, but I do believe it's senseless
one more thing - all the cars were tested in racer v 0.8.8 as I don't have time or need to upgrade to a newer version