The McLaren P1 is a British limited-production plug-in hybrid sports car produced by McLaren. The concept car was capable of reaching speeds of 218 mph (351 km/h) with the limiter on. Debuted at the 2012 Paris Motor Show, retail began in the UK in October 2013 and all 375 units were sold out by November. Production ended in December 2015. The United States accounted for 34% of the units and Europe for 26%.
It was considered to be the successor to the F1, utilizing hybrid power and Formula 1 technology, but did not have the same three seat layout as its predecessor. Like the F1, the P1 is a mid-engine, rear wheel drive design that used a carbon fibre monocoque and roof structure safety cage concept called MonoCage, which is a development of the MonoCell first used in the MP4-12C and then in subsequent models. Its main competitors were the LaFerrari and the Porsche 918. They are all similar in specifications and performance, and in a race round Silverstone circuit they were all within half a second of each other, the P1 finishing first at 58.24 sec and the LaFerrari finishing last at 58.58 sec; the Porsche was in-between with 58.46 sec.
The P1 features a 3.8-litre twin-turbo V8 petrol engine. The twin turbos boost the petrol engine at 1.4 bar to deliver 727 bhp (737 PS; 542 kW) and 531 lb·ft (720 N·m) of torque at 7,500 rpm, combined with an in-house developed electric motor producing 177 bhp (179 PS; 132 kW) and 192 lb·ft (260 N·m). With both engine and the electric motor, the P1 has a total power and torque output of 904 bhp (917 PS; 674 kW) and 723 lb·ft (980 N·m) of torque respectively. The electric motor can be deployed manually by the driver or left in automatic mode, whereby the car’s ECUs ‘torque fill’ the gaps in the petrol engine’s output, which is considered turbo lag. This gives the powertrain an effective powerband of almost 7,000 rpm. The car is rear-wheel-drive with a seven-speed dual-clutch transmission developed by Graziano.
Power for the electric motor is stored in a 324-cell lithium-ion high density battery pack located behind the cabin, developed by Johnson Matthey Battery Systems. The battery can be charged by the engine or through a plug-in equipment and can be fully charged in two hours. The car can be operated using either the petrol engine, the electric motor or with a combination of the two. The P1 has an all-electric range of at least 10 km (6.2 mi) on the combined European drive cycle. Under the EPA cycle, the range in EV mode is 19 mi (31 km). During EV mode the P1 has a petrol consumption of 4.8g/100 mile, and as a result, EPA’s all-electric range is rated as zero. The total range is 330 mi (530 km). The P1 combined fuel economy in EV mode was rated by the EPA at 18 MPGe (13 L petrol equivalent/100 km; 22 mpg-imp petrol equivalent), with an energy consumption of 25 kW-hrs/100 mi and petrol consumption of 4.8 gal-US/100 mi. The combined fuel economy when running only with petrol is 17 mpg‑US (14 L/100 km; 20 mpg‑imp), 16 mpg‑US (15 L/100 km; 19 mpg‑imp) for city driving, and 20 mpg‑US (12 L/100 km; 24 mpg‑imp) in highway.
The P1 has Formula 1 derived features such as the Instant Power Assist System (IPAS), which gives an instant boost in acceleration via the electric motor, a Drag Reduction System (DRS) which operates the car’s rear wing, thereby increasing straight line speed, and a KERS. Both of these features (IPAS, DRS) are operated via two buttons on the steering wheel. It also generates a downforce of 600 kg at 160 mph and it boasts of drag coefficient of only 0.34.
The P1 accelerates from 0–62 mph (0–100 km/h) in 2.8 seconds, 0–200 km/h (0–124 mph) in 6.8 seconds, and 0–299 km/h (0–186 mph) in 16.5 seconds, making it a full 5.5 seconds faster than the F1, coming in at number 10 on the world’s fastest (by acceleration) production cars. It completes a standing quarter mile in 9.75 seconds at 246 km/h (153 mph). The P1 is electronically limited to a top speed of 218 mph (351 km/h), but is capable of reaching a top speed of 401 km/h (249 mph) with the limiter removed. The P1 has a dry weight of 1,395 kg (3,075 lb), giving it a power-to-weight ratio of 647 bhp/tonne. It has a kerb weight of 1,547 kg (3,411 lb) which translates to 593 bhp/ tonne. Actual kerb weight (full tank of fuel, no luggage or people) of US-spec vehicles is 3411 lb. The P1 also features bespoke Pirelli P-Zero Corsa tyres and specially developed carbon-ceramic brakes from Akebono. It takes 6.2 seconds to brake from 190 mph (300 km/h) to standstill, during which it will cover 246 metres. From 97 km/h (60 mph), it will cover 30.2 metres.