McLaren P1 will be limited to only 375 units and will have a starting price of 866,000 GBP and 1,150,000 USD (approx 1,004,800 EUR). McLaren originally planned 500 units but Ron Dennis decided to make only 375 cars after meeting with potential owners who were concerned more about the car's exclusivity rather than top speed or price tag. With Instant Power Assist System (IPAS) turned on, the P1 will hit 100 km/h (62 mph) in less than three seconds, while 0-200 km/h (124 mph) takes under seven seconds. It needs 17 seconds from 0 to 300 km/h (186 mph), before reaching an electronically limited top speed of 350 km/h (217 mph). IPAS is basically the electric motor which can be activated via a steering wheel-mounted button which will give the P1 the throttle response of a normally-aspirated engine, according to McLaren. Another button on the steering wheel is labeled DRS – Drag Reduction System. If pressed, the rear wing reduces in angle to lower drag by 23 percent. This can be turned off by pressing the brake pedal or releasing the button. P1's heart and soul is a hybrid powertrain consisting of a twin-turbo, V8 3.8-liter mid-mounted engine generating 737 HP (542 kW) at 7,500 rpm and 531 lb-ft (720 Nm) of torque from 4,000 rpm and an electric motor adding 179 HP (132 kW) and 192 lb-ft (260 Nm). The McLaren P1 has a combined output of 916 HP (674 kW) and 663 lb-ft (900 Nm). Power is transferred to the ground via a 7-speed twin clutch Graziano gearbox. It can be driven on electric power for 20 km (12.4 miles) at an average speed of 30 mph (48 km/h). The McLaren P1 has a drag coefficient of 0.34 and can generate 600 kg (1,322 lbs) of downforce (5x more than MP4-12C). It has a carbon fiber chassis which weighs 100 kg (220 lbs), making it the lightest ever installed on a road car and capable of providing F1-like safety and rigidity, according to the British firm. Compared to the legendary F1, its successor is 300mm longer and slightly wider and longer than the MP4-12C. It tips the scales at only 1,400 kg (3,086 lbs) thanks to its lightweight construction. It has CO2 emissions of less than 200 g/km and rides on bespoke Pirelli P Zero Corsa tires. Stopping power comes from discs featuring a new type of carbon ceramic which hasn't been used so far on a road car, only in space. This material is stronger than regular carbon ceramic and dissipates heat more effectively. In addition, these discs are lighter than usual and boast a custom ceramic layer coat on the friction surfaces for a mirrored look. Moving inside the cabin, the McLaren P1 features a driver-oriented cockpit where carbon fiber is the primary material. All carbon surfaces lack the top layer of resin which would have added 1.5 kg (3.3 lbs). Steering column and seats are adjustable, while the seat backrests are fixed at a 28-degree angle, but a 32-degree change is available for increasing helmet clearance. The extremely thin carbon seat shell weighs only 10.5 kg (23.1 lbs). Although focus was on making it as light as possible, McLaren has added amenities such as satellite navigation, climate control and premium audio system. However, the list of comfort features ends here since this was built primarily as a driver's car, with the position of the driver being individually configurable and with a digital dash showing all relevant information in typical racing style.