Bonus Cars:

 Exotic cars are awarded after successfully completing a series. 

 EASY

 Arcade: Basic Series         -->   Porsche 959
 Arcade: Pro Series           -–>   Ferrari 512 TR
 Normal Championship Series   -–>   Bugatti EB110 GT 

EXPERT

 Arcade: Basic Series         –->   Ferrari F-50
 Arcade: Pro Series           –->   Dodge Viper GTS
 Normal Championship Series   –->   McLaren F1 and reverse tracks

Reverse Tracks:

 To race on reversed tracks, beat the Championship  Mode in Novice and
 Expert difficulty levels. 

Shortcuts:

 This game is loaded with shortcuts.  To find them for yourself, start
 a single race then turn around and drive in  reverse.  You'll have no
 time limit and can look for as long as you like.