Why is Audi Called Fake Four-Wheel Drive?

1 Answers
StCayden
07/30/25 4:37am
Currently, Audi's Quattro four-wheel drive system is divided into two forms: one is the on-demand four-wheel drive, and the other is the full-time four-wheel drive. The on-demand four-wheel drive system can be understood as a simplified version of the mechanical Quattro system, where the rear differential uses a multi-plate differential, resulting in reduced performance. Therefore, this Quattro system with a multi-plate clutch is referred to as "fake four-wheel drive." There are significant differences between on-demand four-wheel drive and full-time four-wheel drive, mainly in the following aspects: 1. Different working modes: On-demand four-wheel drive mostly operates in front-wheel drive mode. When the vehicle detects wheel slippage, it uses brakes, ABS, and other means to brake the slipping wheel, thereby transferring power to the other side to help the vehicle escape. Full-time four-wheel drive maintains a four-wheel drive state at all times, significantly improving vehicle stability. 2. Different differentials: On-demand four-wheel drive uses a multi-plate differential, while full-time four-wheel drive employs a purely mechanical Torsen differential lock, which is superior in performance and reliability.
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