How does Audi's Quattro all-wheel drive system work on the A4?

I'm considering buying an Audi A4 and I've heard a lot about their Quattro all-wheel drive system. Can someone explain how it works and how it differs from traditional AWD systems?

The Quattro all-wheel drive system on the Audi A4 uses a hydraulically activated clutch to distribute power between the front and rear axles as needed. It provides better grip and handling on slippery roads compared to traditional AWD systems.

Quattro AWD on the A4 constantly monitors grip and wheel rotation, sending power to where it's needed most. This dynamic system provides excellent stability and control in all driving conditions.

The A4's Quattro system offers a rear-biased torque split, giving it a more sporty feel compared to other AWD systems. It's perfect for driving enthusiasts who want added performance and control.