It is characterized by immediate throttle response, a linear power curve and an unusually high and flat torque curve. (press.bmwgroup.com)
Featuring an uprated version of the Mercedes - AMG sourced M158 V12 bi-turbo engine, the Huayra Roadster produces 753bhp and «over» 738 lb ft of torque, with the turbos re-engineered to provide more immediate throttle response while dry sump lubrication should keep the motor responsive even under extreme lateral loads. (evo.co.uk)
But the really special thing about the P1 is its combination of almost incomprehensible power, freakishly immediate throttle response due to the electric torque - fill, and the colossal wheeze of the giant turbochargers. (evo.co.uk)