What is Audi's VR6 engine and how does it differ from a regular V6?

I've heard and seen the term VR6 used to describe Audi's engines. What exactly is a VR6 engine and what advantages does it have over a typical V6 engine?

The VR6 engine is a unique design with a narrow angle between the two banks of cylinders. This allows for a more compact engine, which is advantageous for vehicles with limited engine bay space. In terms of performance, the VR6 engine often produces more torque than a regular V6 engine, giving it a more responsive and powerful feel.