One thing that you need to know about racing, you need to win to get part of the reward money. If you fall in the last place then forget about the money. That is why; racers would practice from dusk till dawn before taking part of the race. No racers would want to be in the last place.
In this game, you need to understand that speed isn't everything as you need to control your car well. Each circuit requires you to turn, so control plays a big part in this game. After each level, you would win part of the prize money. You can use the money to buy some upgrade for your car.