Nissan GT-R Prototype
The Nissan GT-R Prototype is a powerful car with fantastic speed combined with traction that will allow you to take corners at a much faster pace. This particular car is ideal for the speed challenges because it is easy to steer and allows for the best balance between speed and traction.
Ford GT
If you seek better steering to get the edge, the Ford GT is the best car for the speed challenges. Though it does sacrifice a little acceleration for traction steering power, it contains the same amount of power needed to match any car in the race. You have to be a little more wily with this car because you will be hard-pressed to beat some cars, but with the superior traction, it should not be that much of a challenge.
Lamborghini Murcielago
If you are looking for pure, unbridled speed, the Lamborghini Murcielago is the car you want for the speed challenges. It sacrifices much of its traction for pure acceleration. It is perfect for straightaways to get a leg up on the competition. The Lamborghini Murcielago is one of the fastest cars on the game and, if you can handle the loose traction support, it is the best car for the speed challenges.