Citroen GT, real or not?
In the video game, this car is pretty quick, but will it hit the streets?
http://www.autoblog.com/2008/12/28/video-citroen-gt-in-motion-in-polish/
However, to fuel the speculation, some polish guys actualy drove it
And it has been seen on the street:
In Gran Turismo it has stepless transmission, and actually is faster than the Ferrari F2007 on some tracks: