I did some research and found out that the car (996 Turbo) runs in the german
"STT". There all kinds of different racecars in this series, like Stealth B6, BMW E30 M3, highly tuned Audi's, a lot of Porsche's and even smaller cars, like Renault Clio's.
Unfortunately i dind't find any tech spec's, but regarding the "RS Tuning" sticker on the bonnet, i'd say this thing has at least 650 hp.
For Pic's:
http://www.auto-rennsport-page.de/news/stt/fotos_stt.htmhttp://www.spezial-tourenwagen-trophy.de...pressionen.html (STT behind the scenes

)