Board Thread:Game Discussion/@comment-205.250.46.38-20160410231114/@comment-199.7.156.138-20160411023247

As far as I know, you can't win any cars in the career, only via the special events. You do get discounts(usually 20%) on them when you unlock them though, so it's good to hold off on winning that last trophy needed to unlock them until you have enough cash or gold to take advantage of the discount. Also, some cars can be unlocked in more than one series.