Audi Models

[Gageallen]

I have an audi a4 I recently bought. And I just happen to be doing a report on cars for school and I'm doing it on audi's obviously, so anyway I know most of the models of them I was just wondering if someone else could get me more info..like the models, maybe specs of each or what they're like, and I was also wondering the the b5 or whatever means before some of the models like a b5 a4 or something

Thanks

[a4rings]

http://en.wikipedia.org/wiki/Audi