Which Audi does not use Haldex based all wheel drive system?

The Audi A8 does not use a Haldex-based all-wheel drive system. Instead, it utilizes a Quattro all-wheel drive system, which is unique to Audi. The Quattro system is known for its more advanced and performance-oriented capabilities, offering a permanent four-wheel drive with a power split of 40:60 (front/rear) under normal driving conditions. This system provides better handling, improved traction, and enhanced stability, making it a suitable choice for the luxury and high-performance characteristics of the Audi A8.