While Sonic R might of been a boring simplistic racer, it's Gran Turismo in comparison to Sonic Drift and its sequel.
While it doesn't look so bad from the screen, it's like playing that racing toy game your grandma bought you from the dollar store. The background barely changes, and you start to wonder what's the point?
And to make matters worse, Sega even made a sequel.
Which wasn't much better to be honest. Slightly better graphics and more drivers...