Enter these as Player Fours' name. You should hear a short beep.

Code                    Result 
world                   class A8 Championship Available 
turbo challenge         A8 Cars Available in Single Race and Time Trial  
max power               Secret Citroen WRC Car 
throw me a bone         Gives Citroen Saxo WRC 
give me time 1          More Minute of Service Time 
                        (Press T at Service Screen)
group b                 Bonus Car 
mooserati               Bonus Car 
lambaaghini             Bonus Car 
spud car                Bonus Car 
precious things         Bonus Car 
furry dice              Bonus Car 
mf hotback              Bonus Car 
tree hugger             Bonus Car 
radio car               R/C Car 
arcade unlimited        Energy in Arcade Mode 
arcade action           Arcade Mode Surprises