The principle is simple: in the same way that four brakes ensure better deceleration, four driven wheels enable better acceleration and higher cornering stability. Audi quattro permanent four-wheel drive is the systematic application of this basic principle.
Depending on the driving situation and road surface, quattro technology also distributes drive power continuously between the front and rear axles. This ensures better traction, even in conditions in which vehicles with two driven wheels are no longer able to grip.