What is the difference between a quattro and an all-wheel drive system in Audi?

I'm considering buying an Audi, but I'm confused about the difference between their quattro and all-wheel drive systems. Can anyone break it down for me?

Quattro is Audi's brand name for their all-wheel drive systems. It uses a center differential to distribute power between the front and rear axles, providing better balance and traction in all conditions.

All-wheel drive generally refers to a system that distributes power to all four wheels, typically with a default front-to-rear bias. Quattro, on the other hand, uses Audi's unique technology to adjust power distribution between individual wheels for optimal performance.

Think of quattro as a more advanced and smarter version of all-wheel drive. It constantly monitors road conditions and adjusts power delivery to provide maximum grip and handling.