How does the quattro AWD system work in the Audi A1?

I've heard that the Audi A1 comes with a quattro all-wheel drive system, but I'm not sure how it works. Can someone explain the mechanics behind this technology and how it differs from traditional AWD systems?

The quattro AWD system in the Audi A1 is based on a mechanical locking center differential that distributes power between the front and rear axles. It constantly monitors road conditions and can send up to 70% of the torque to the front or rear wheels as needed for optimal traction and performance.

Unlike traditional AWD systems, the quattro technology in the Audi A1 is proactive rather than reactive. It uses sensors to anticipate loss of grip and proactively sends power to the wheels with the best traction, providing better stability and control in all driving conditions.