So far, McLaren has been tight-lipped about the potential output of its new P1 supercar. Until now, all we’ve known for certain is that it will benefit from a supplemental Kinetic Energy Recovery System (KERS), meant to boost horsepower under acceleration. Technically, speaking, that makes the P1 a hybrid automobile, though that’s where the similarities between it and a Prius end.
McLaren’s P1 supercar – image: McLaren
The P1’s twin-turbo 3.8-liter V-8 (borrowed from the McLaren MP4-12C) will make 727 horsepower on its own, with peak torque (531 pound-feet) available from 4,000 rpm. Boosting output is a McLaren Electronics-designed electric motor, rated at an additional 176 horsepower and 192 pound-feet of torque. Since electric motors make peak torque from 0 rpm, that’s power that can be used to get the P1 moving, quickly, from a standstill, and if you’re keeping score at home that produces a total output of 903 horsepower and 723 pound-feet of torque.
McLaren’s P1 supercar – image: McLaren
Feeding the electric motor is a high-density battery pack that adds just 211 pounds to the car’s weight. To ensure maximum efficiency and cell life, the pack is liquid cooled, and it can be completely recharged (with a supplied plug-in charger) in only two hours. Once full, the pack supplies enough power in full electric mode for up to 10 kilometers (6.2 miles) of driving.
McLaren’s P1 supercar – image: McLaren
The real purpose of the hybrid system, however, is supplemental power. There’s an IPAS (Instant Power Assist System) button on the steering wheel, and pressing it instantly serves up the extra 176 horsepower and 192 pound-feet of torque the electric motor delivers. KERS isn’t the only Formula One technology employed by the P1, either; opposite the IPAS button on the P1’s steering wheel is a button labeled DRS, for Drag Reduction System.
McLaren’s P1 supercar – image: McLaren
Like an F1 car, the P1 uses a movable rear wing to adjust downforce. While downforce adds grip in a corner, it also takes away speed in a straight line. Thumbing the DRS button will change the rear wing’s angle of attack, decreasing drag by as much as 23-percent. Release the button, or hit the brakes, and the rear wing takes a steeper angle, increasing drag and rear downforce.
Look for further details on the McLaren P1 to be revealed when the car breaks cover at the upcoming Geneva Motor Show.
Kurt Ernst has been passionate about automobiles and driving nearly his entire life. His early years were shaped working in the family service station, though his real passion was auto racing. After graduating from the University of Colorado, Kurt spent a year club racing with the Sports Car Club of America, before focusing on a business career in marketing and project management. Later, his passion for writing and the automotive hobby found him freelancing for a variety of automotive news sites, including Automotive Addicts and Motor Authority, where his work was syndicated and appeared in several national publications. Recognized as an expert in the automotive field, Kurt joined Hemmings Motor News as an Associate Editor in 2013, and in the years since has progressed to Editor, Hemmings Daily; Managing Editor for Hemmings Motor News, Hemmings Classic Car, Hemmings Muscle Machines, and the Hemmings Daily; and now, Managing Editor, Hemmings Auctions. Kurt was instrumental in organizing the Hemmings Motor News Concours d’Elegance from 2013-2019, and has served as a judge at this event and The Vintage Racing Stable Concours d’Elegance. A Skip Barber Racing School graduate and prolific writer, Ernst is also skilled in copyediting, project management, brand development, and public relations.
