R4: Ridge Racer Type 4 includes a bonus disc containing a new version of the original Ridge Racer, called Ridge Racer Turbo (known in Europe as Ridge Racer Hi-Spec Demo). This game runs at 60 frames per second with Gouraud shading utilised on the car models, as seen in R4. It only features the beginner mode version of the track. The gameplay was pretty much the same as the original Ridge Racer. Like usual, after the regular courses were beaten, the extra courses were unlocked. At the same time, the player would be required to race against the duel cars. They were the #13 Devil 13" Racing car and the #0 White Angel car.