2013 Audi S6 spy shots
2013 Audi S6 spy shots – Click above for high-res image gallery

In addition to a hybrid version, Audi is giving its sleek new A6 the full S treatment. Our spy photographers recently snapped this completely undisguised prototype out testing in Germany, leading us to believe that the production car will likely debut in the not-too-distant future. Audi's usual S up-do is fully evident here, with the more aggressive front fascia, side sill extension and four exhaust tips out back all signaling a more sporting sedan.

The new S6 will likely ditch the current car's 5.2-liter V10 mill in favor of a turbocharged 4.0-liter V8. Since the S6 will compete with the likes of the Mercedes-Benz E63 AMG and BMW M5, expect power output to be somewhere in the 500- to 550-horsepower range.


Related GallerySpy Shots: 2013 Audi S6
2013 Audi S6 spy shots2013 Audi S6 spy shots2013 Audi S6 spy shots2013 Audi S6 spy shots2013 Audi S6 spy shots2013 Audi S6 spy shots2013 Audi S6 spy shots

[Source: KGP Photography]