Talk:List of all cars (fully upgraded)/@comment-122.171.98.29-20140814095426/@comment-101.173.255.240-20140819084716

You don't need to fully upgrade the spyder to win the Challenge. I have won the car with only 25 of the upgrades. This cost me 52 in Gold. You win 120 Gold across the Challenge. So I have made a net gain of 68 Gold + the free Spyder.