Audi Quattro is not 4WD, but it does provide power to all 4 wheels at different times to make sure you always keep traction and keep control. It's a difficult technology to explain but an easy one to demonstrate using the accelerometer in the apple iPhone. Of course once you realise how great Quattro and Audi are, you may want to book a test drive or visit a showroom, and by using the other features of the iPhone we can make that easier too.
