Hidden car:
Complete and save the game as World Grand Prix Champion. Restart the game and hold A + B when the phrase "Please wait while loading" appears. The '96 Forti drivers now have the Ubi Soft Original H-RA V12 on the driver selection screen.

Engine select:
Complete and save the game as World Grand Prix Champion. Restart the game and highlight a driver at the driver selecting screen. Press Left-C or Right C to change the current engine.

Unlimited fuel:
Select Grand Prix mode and set the fuel setting to "10%".