Built, tuned, and boosted — this Stage 2 Audi S4 by REVO puts out a brutal 500hp, and it begs the question: why pay more for an RS4? In Part 1 of this series: Full REVO Stage 2 build overview Turbo, ...

The phenomenal quattro permanent all-wheel drive system has helped this bone-stock Audi RS 4 Avant cope with the white stuff ...

It's a battle of Audi beasts! In this 3-way drag race, we pit a factory Audi RS4 against a tuned REVO Stage 2 Audi S4, and a completely stock S4. Which one truly delivers on the strip? In this race ...

Audi seems to have created something special in the current generation S4. To the layman, having two less cylinders than the previous generation’s naturally-aspirated V8 could be seen as a backward ...

ABT Sportsline is already offering certain conversion packages for the Audi S4 and RS4, but their latest work revolves around the regular A4 models, of the B9 generation. With their own engine control ...

Diesel's low-rev response, some fussy facelift styling details Understated almost to the point of anonymity, the S4 is the mid-level performance version of the Audi A4 saloon that’s seen more heart ...

In the latest episode of DRIVE, Matt Farah took a trip to the UK where he had a dispute with Chris Harris about which car is better: a standard 2013 Porsche Cayman or a tuned Audi S4->ke1088? It’s not ...