No, it's not. The quickest at the moment is the Radical SR8 with 6:55, and that's a 4 year old record... Second place is a Dodge Viper SRT-10 ACR, so the american cars are not that far behind. The engine in the SRT-10 ACR is a 8.4l engine with 600bhp though, so it doesn't exactly cross the 100bhp/l mark. The SR8 on the other hand has a 2.6l engine with 363bhp, so it crosses it just fine...
http://en.wikipedia.org/wiki/Nurburgring_lap_times#Production_vehicles
No, it's not. The quickest at the moment is the Radical SR8 with 6:55, and that's a 4 year old record... Second place is a Dodge Viper SRT-10 ACR, so the american cars are not that far behind. The engine in the SRT-10 ACR is a 8.4l engine with 600bhp though, so it doesn't exactly cross the 100bhp/l mark. The SR8 on the other hand has a 2.6l engine with 363bhp, so it crosses it just fine...