McLaren P1 confirmed with 916 HP

2013 McLaren P1
2013 McLaren P1

Arriving in Geneva

McLaren has confirmed the P1's hybrid powertrain will be able to produce 916 HP (674 kW).

The McLaren P1 will be powered by a mid-mounted V8 3.8-liter twin-turbo gasoline engine capable of producing 737 HP (542 kW) at 7,500 rpm and a peak torque of 720 Nm (531 lb-ft) from 4,000 rpm. It will work together with an electric motor generating an additional 179 HP (132 kW) and an instant torque of 260 Nm (192 lb-ft).

The driver will be able to activate the electric motor via the Instant Power Assist System (IPAS) which can be operated by a button mounted on the steering wheel. According to McLaren, this will give the P1 the throttle response of a normally-aspirated engine.

Another button on the steering wheel will turn on the F1-style Drag Reduction System (DRS) which will reduce the amount of drag on the rear wing. The P1's rear wing reduces in angle to lower drag by 23 percent. Deactivating DRS is done by either releasing the button or pressing the brake pedal.

The battery will be installed on the underside of the carbon fiber chassis and will need two hours for a full charge when using a plug-in charger which can be found in the luggage compartment. The 96 kg (211 lbs) battery will allow the McLaren P1 to travel in electric mode for up to 6 miles (9.6 km).

More details are available in the press release section.

Source: McLaren
  • IPAS (Instant Power Assist System) and DRS (Drag Reduction System) offer instant boost of power and straight-line speed
  • 916PS (903 bhp) and 900Nm, with emissions of less than 200g/km
  • Substantially revised 3.8-litre twin-turbo V8 petrol engine coupled to low-weight, highly efficient electric motor ensures instant torque for optimised throttle response
  • Full E-mode offers in excess of 10km emission-free driving

The McLaren P1™ will have the combined force of two highly-efficient powerplants, offering the optimum mix of superb throttle response, day-to-day drivability and top speed. A mid-mounted 3.8-litre twin-turbo V8 petrol engine and a highly effective electric motor give a combined output of 916PS (903 bhp) and a maximum torque figure of 900Nm, ensuring instantaneous throttle response through the rev range, more akin to a naturally aspirated engine. Emissions of less than 200g/km on the combined cycle are reduced to zero in full electric drive mode, while the Formula 1-derived DRS and IPAS technologies offer an increase in straight-line speed and an instant boost of power.

The 3.8-litre twin-turbo V8 petrol engine in the McLaren P1™ is a new version of the familiar M838T unit, that has been significantly upgraded to optimise cooling and durability under the higher loads. The engine block has a unique casting to incorporate the electric motor. The petrol engine produces 737PS (727 bhp) at 7,500rpm, and 720Nm of torque from 4,000rpm. To optimise efficiency of the petrol engine, extensive testing and development work has always been carried out with McLaren Automotive technology partner Mobil 1 on lubrication and hydraulic fluids.

The lightweight electric motor, developed by the McLaren Electronics arm of the Group, produces 179PS (176 bhp), and is unique to the McLaren P1™. The motor produces maximum torque of 260Nm instantly from a standstill, greatly increasing the throttle response of the McLaren P1™, and peak combined torque of 900Nm is delivered from just 4,000 rpm. In addition to this, the McLaren-developed ‘boost’ system, IPAS, provides up to 179PS instantly. The instant response of the electric motor provides a sharper throttle response more associated with a normally aspirated engine, and the significantly enhanced air-charging system enables the McLaren P1™ to have more top-end power – the perfect combination for high performance.

The electric motor is mounted directly onto the engine, and all drive is channelled through the dual-clutch seven-speed gearbox to drive the rear wheels. Thus, the electric motor and 3.8-litre twin-turbo V8 petrol engine work seamlessly together, providing more than just added ultimate power and torque.

A further benefit is that the e-motor can provide faster upshifts. This is achieved through the application of instant negative torque at the point of shift, making the engine revs drop as quickly and efficiently as possible to the required engine speed for the upshift.

In addition to the obsessive weight-saving measures demonstrated throughout the McLaren P1™, so too is the optimisation of usable energy. When off-throttle the electric motor provides additional drag torque, recovering energy to the battery that would otherwise be lost to the brakes.


The McLaren P1™can be driven in a variety of modes, powered by the engine and electric motor together, or solely by the electric motor. This ensures versatility and ease of transportation, allows use in low emission zones and residential driving is optimised with near-silent running.

Maximum power comes when using both powerplants together, but even in E-mode the performance is strong. E-mode is the most economical mode available with zero tailpipe emissions. In E-mode, the McLaren P1™ can travel more than 10km with electric-only power – enough for most city journeys. When the battery is empty, the petrol engine will automatically start to maintain drive and charge the battery.

IPAS and DRS optimise performance and throttle response

The power available via the petrol engine and electric motor is further enhanced on the McLaren P1™ through two steering wheel-mounted buttons which activate the DRS (Drag Reduction System) and IPAS (Instant Power Assist System).

The Drag Reduction System used on the McLaren P1™ is a technology similar to that employed on Formula 1 cars.  Speed is increased by reducing the amount of drag on the rear wing and, where the MP4-28 has a moveable flap on the rear wing, the McLaren P1™ has a wing that reduces in angle to lower drag by 23%. The system immediately deactivates when the button is released, or if the driver touches the brake pedal.

IPAS is designed to deliver power rapidly for high performance acceleration, and provides 179PS of instant additional power. In developing the IPAS technology for the McLaren P1™, power delivery was prioritised over energy storage. This is achieved through a groundbreaking, lightweight battery pack, which offers greater power density than any other automotive battery pack on sale today.


The high power density has been achieved through a combination of high power cells, low pack weight and an innovative cooling system. The battery weighs just 96kg, and is mounted onto the underbody of the high-strength Formula 1-grade carbon fibre MonoCage chassis, which seals the unit in the vehicle, thus avoiding the added weight of any unnecessary battery packaging.

Due to the amount of power being supplied by the battery, complex cooling is required to guarantee cell performance and reliability. The coolant flow is balanced so each cell is cooled to the same temperature across the entire pack.

In addition to the battery being charged via the engine, the McLaren P1™ is also equipped with a plug-in charger which can recharge the battery, from empty, in only two hours. The plug-in charger can be stored in the luggage compartment, although the customer may choose to store it off-board – in a garage or the pits – to save weight.

Further details of the McLaren P1™ will be released in the coming weeks, before the production-ready car makes its world debut at the Geneva Motor Show next month.

Related Articles

Add comment

subscribe to comments
comment rules Add comment

Comments (8)

speedhunter speedhunter
no doubt this will be the best supercar ever. but i keep thinking what if it didn't have all the heavy hybrid system.. battery weights 200lbs, electric motor and other things for 100 lbs and bigger body to make room for hybrid system adds maybe 100 lbs.. What if this was a smaller nimbler 400 lbs lighter super car with just 737hp engine... just like original Mclaren F1 did...
Feb 21st, 2013 2:58am
1 1
fgb8387 fgb8387
this is truly a f1 replacement..
Feb 20th, 2013 7:32pm
1 1
Aesthetics Aesthetics
ferrari would be V12, a huge factor with the top end audience its marketed for....ferrari and mclaren's hybrid will not activate to make the car 4wd where as porsche's 918 will...very clever set up, 4wd when you need it then 2wd when you dont. mclaren and ferrari's has a motor connected to the engine/drive train. i find this an irony since ferrari are arguably the ones among these most successful with understanding high performance 4wd with the constant praising by jounalist on the ferrari ff system which would be similar to a twin motor up front with its gearbox and left and right clutch for indivisual wheel...i guess they prioritize light weight
Feb 20th, 2013 5:41pm
0 1
Ratt Ratt
Best camo ever!
Feb 20th, 2013 2:22pm
1 0
hunker7 hunker7
Feb 20th, 2013 1:31pm
2 0
Hellbound Hellbound
Someone at Ferrari just pooped a brick. Actually they'll both be amazing cars, the Porsche too. Glad they all exist! :) Although I guess we have 'the rich' to thank for that, as they're the ones creating the demand for such vehicles. Meh.
Feb 20th, 2013 1:10pm
4 0
infond infond
Finally, I've been waiting for this! So more than 900 HP, as expected. I want to see this beast on track as soon as possible.
Feb 20th, 2013 1:04pm
0 0
uzzie uzzie
Been waiting for this for a long time, next is seeing it destroy others on the circuit lol
Feb 20th, 2013 12:07pm
1 1