To unlock the following cars, complete the following tasks.

Car	How to unlock
Andorra Racer car	Beat the Developer Time in Time Attack with the 6 default cars.
Baja Dune Buggy car	Win a race online.
Bowler Nemesis car	Win a Quick Race on Arcade Difficulty on every 4 tracks.
Iclandic Racer car	Win Championship Mode with every 6 of the default cars.
McRae Enduro car	Beat the Developer Time in Time Attack on all courses.