boosted by two  centrifugal superchargers  that provide 17.5 psi (1.2 bar) of boost with an 8.2:1 compression ratio. The engine produces 806 bhp (601 kW; 817 PS) at 6900  rpm  and 678 lb·ft (919 N·m) of torque at 5700 rpm on 91  octane  ( U.S. rating ) gasoline.   The engine is lubricated with a  dry