For reasons unclear, Mercedes and Pagani both felt the need to quash increasing speculation that the V12 in the coming Pagani C9 has anything to do with the V12 in the SL65 AMG Black Series. AMG is developing the motor for Pagani's next supercar, and Road & Track and Autocar had both said the Pagani engine was an evolution of a mill from Mercedes.
The twin-turbo V12 in the Black Series was rated at 670 horsepower and 730 pound-feet – itself a massaged and tuned version of the motor in the standard SL65 AMG. The joint statement to refute said, however, that "The engine of the Pagani C9 is not a derivative of the AMG V12 engine developed for the SL65 Black Series, nor is the AMG V12 engine in the SL65 Black Series derived from the engine AMG is currently developing for the Pagani C9." That about says it all, no?