Test
If you have unlocked a car in career mode and you want it, don't buy it directly. The first thing to do is customize the car how you want it. Then, put all the available performance parts you have on it. Then race it to test it. If you like it, buy it in career mode. If you don't like it, don't buy it. This saves you a chunk of money. It helped me beat Bull and Razor! Oh, and another thing: if you do want to buy the car, then make sure that you have enough money to buy it and the performance parts for it.
Hope this helps,
Bullet8
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