New (C6) RS6's (2007) twin turbocharged 5L V10
should produce about 550 hp and 525 lbs/ft of torque (both estimated). And the hp and torque curves with the twin turbocharged V10 on the new RS6 should be just as wide or wider than the hp and torque curves with the twin turbocharged 4.2L V8 on the upcoming (C5) RS6. Also, both the C6 S6 (2006) and RS6 should have the same transmission options (six speed tip and seven speed SMG; one can only hope) as the B6 S4 and RS4, save for the six speed manual (oh, well). In addition, both the C6 S6 and RS6, like all other C6 A6s will weigh about 500 pounds less than their predecessors due to all aluminum construction with a single piece ASF (aluminum space frame).