Some (fictional) background on the cars.
AR2 (Speedtec)- The European entry into the series, the AR2 was the creation of a join venture of German and Italian car designers and engineers. A large rear wing for high downforce was incorporated, and an engine with a good bit of power. The downside to the car is an increase in drag, and slightly lower top speed that the other entries. Still is probably the strongest car in the series.
Typhoon (Weston)- The British Weston group decided to try to bring their car into the mix in the GT Series, a car focused on aerodynamics and reduced drag. They accomplished this with the Typhoon, but with a slight cost in the handling department, and also a less powerful motor, but is still as fast down the straights as the other two cars.
Venom STR (American Racing Compay)- After limited success in the touring car arena with the Striker Touring Car, the American Racing Company has turned their focus to GT racing, with the powerful Venom STR. A little unwieldy at times, but still a worthy competitor, the Venom STR is the middle of the road option of the three manufacturers in the series.
I sure am filling up the car page at the moment, aren't I?