If you play your cards right, at least in the NTSC version, you can get 4 F1 prize cars in a row when you get 100%. I finished Arcade mode, Time Trials, and all races in Beginner, Amateur, and everything in Pro except the Formula GT. I preran the Test Course in the TS020, and I think Laguna, to make sure I'd have gold on those races. Then I started the FGT, and won every race except I skipped the Test Course to save oil. When I won at Monaco I received 4 F1 cars right in a row: 1 for the FGT, 1 for completing Pro mode, 1 for completing Simulation mode, and 1 for 100% completion.