Gran Turismo will soon appear to your door doorsteps with two new versions called Gran Turismo Premium and Classic that are going to hit in 2008.

Gran Turismo HD Premium is basically a GT5 prologue using the full graphics power of the PS3. It comes with 2 tracks both original and new and 30 cars including some new ones. You can buy additional 30 cars and 2 courses for this edition later online.
While Gran Turismo Classic is what adopts the GT HD playable demo at E3 and meant to display the online feature. About 20 cars take part in the convoy. You download a car for 50 to 100 yen (0.43 - 0.85$) and a course for 200 - 500 yen (1.71 - 4.26$). Over 750 cars and 50 tracks are available for purchase. Users can characterize race events freely and can hold online race events by themselves.
Via: joystiq