All-wheel drive (AWD)
What is all-wheel drive?
An all-wheel-drive (AWD) system sends the power of the engine to both the front and rear wheels all the time. This means that if one or more wheels is stuck or can’t get any grip on the road, the other wheels are still driving the car forward. Some cars have permanent AWD, so all the wheels are always powered directly by the engine. Other cars have part-time AWD, so the car mostly uses just two wheels (usually the front wheels), which uses less fuel, but when needed, sends power to all four wheels.