All wheel drive

The idea of All wheel drive for a high horsepower car allows the driver to put all the power to the ground. All Wheel drive is not just for off roading. Their are more All wheel drive cars not designed just for the off road like a WRX Sti, Lancer Evo, and Eagle Talon. All Wheel drive is a great for the street as it helps in wet or slick conditions, so you have no tire spin.

Thanks for that....

for extra speed

Actually m8 AWD systems have more parasitic loss and it will decrease top speed. It does increase traction which allows for better acceleration and increased control out of turns.

it gives the car more traction

traction = acceleration = greater handling = winning races