The term signifies Audi’s all-wheel drive system. The system, first introduced in 1980, distributes power to all four wheels of a vehicle, enhancing traction and handling. This capability is especially advantageous in adverse weather conditions or on challenging road surfaces. For example, an Audi vehicle equipped with this system can maintain greater stability when accelerating on snow-covered roads compared to a front-wheel drive vehicle.
The implementation provides increased grip, improved acceleration, and enhanced cornering stability. Its historical significance lies in its pioneering role in popularizing all-wheel drive technology in passenger vehicles. It marked a significant departure from the traditional application of all-wheel drive, which was primarily reserved for off-road vehicles, bringing its benefits to everyday driving scenarios. Over the years, the system has evolved through numerous iterations, each iteration incorporating advancements in technology to further optimize performance and efficiency.