Audi World Site -  .

Audi Forums - - Discussion board for Audi enthusiasts.

Audifans - - Maintains the Quattro email list and a number of other forums. Also offers classified ads, links to parts suppliers and mechanics, and searchable archives.

Audifans.net - - A portal for Audi owners and enthusiasts's. Includes a forum, classified advertisements, photo gallery, news and reviews, and news on Audi Motorsport.

Audiport.com - - Enthusiast information related to the Audi S4 and A4.

audi-sport.net - - Forums for owners and fans of Audi and VW automobiles. Membership is required to post.

AudiWorld - - A collection of Audi news and information. Discussion forums, up-to-date news, current and historical model listings, model FAQs, and product reviews.

Chris Miller's '91 200 Quattro 20-Valve Site - - 1991 Audi 200 Quattro 20-valve repair, specifications, photos, reviews, and information for the enthusiast.

CRX Zero's Audi Site - - A site including photos of various Audi models.

DKW, Auto Union & Audi in South Africa - - A wide range of information on DKW, Auto Union and Audi in South Africa.

European Car Magazine: Look Back: Audi Cabriolet - - Long term report on the Audi Cabriolet, detail's the vehicles faults and features.

High performance cars from Audi - - Information on the S and RS series performance automobiles from Audi. Includes technical details and forums. Site is primarially in German, and seems to have most if not all of the information available in English also.

Huw's Audi Garage - - Provides maintenance details, wiring diagrams, and basic "how to" advice.

quattroforum.com - - Forum for owners and enthusiasts.