[A4] Quattro Evolution

[Richard Hurt]

Hey all,

A buddy at work is looking to get into Audi's and he was asking me about the
Quattro system.  I remember seeing a really good web page that went through
the evolution of the Quattro system in detail.  It told about all 4 versions
and how they work and how their different from each other and from other
systems (VW 4-Motion, Suburu, etc.).  The only problem is that I can't
remember where I saw it.  Does anyone have any links I can forward on to him
and get him in the know?

Thanx!
  Richard