B8 Audi A4 Avant Gets S4 Powertrain Swap for Max Performance - AudiWorld

This Audi A4 Avant S4 clone mimics something that wasn't sold in the U.S., and the results are quite impressive.

Audi A4 with a Supercharged S4 Powertrain – Engine Swap Depot

2009 Audi S4 First Drive: Pray for Rain - AudiWorld

Which used Audi models should I avoid while buying a used Audi? I want a B7 A4 Quattro Avant 3.0 TDI. Is that a reliable car? - Quora

Oil changes first time Audi owner. They recommend every 10k for a oil change and I have never went that long on a oil change and worries me. Should I change it

Audi Announces 2009 MY Pricing for the All-New A4 Sedan and Avant Models - AudiWorld

Road Test: 2009 Audi A4 Avant - AudiWorld

B9 Audi S4: One year update/impressions

B8 Audi A4 Avant Gets S4 Powertrain Swap for Max Performance - AudiWorld

The New 2007 Audi A4 and S4 Cabriolet - AudiWorld