Porsche 918 Spyder
|Porsche 918 Spyder 2013 to 2015|
|Body and chassis|
|Class||Sports car (S)|
|Body style||2-door roadster (Spyder) |
2-door coupé (RSR)
|Layout||M4 layout with all-wheel steering|
|Related||Porsche RS Spyder |
Porsche 911 GT3 R Hybrid
Porsche Panamera S E-hybrid
|Engine||4.6 L V8|
|Electric motor||2 electric motors on front and rear axle|
|Transmission||7-speed PDK dual-clutch|
|Battery||6.8 kW·h liquid-cooled lithium-ion battery|
|Range||680 kilometres (420 mi) (EPA)|
|Electric range||19 km (12 mi) (EPA)|
|Wheelbase||2,730 mm (107.5 in)|
|Length||4,643 mm (182.8 in)|
|Width||1,940 mm (76.4 in)|
|Height||1,167 mm (45.9 in)|
|Kerb weight||1,634–1,704 kg (3,600–3,760 lb)|
The Porsche 918 Spyder is a mid-engined plug-in hybrid sports car manufactured by German automobile manufacturer Porsche.The Spyder is powered by a naturally aspirated 4.6-litre V8 engine, developing 616 PS (608 bhp; 453 kW), with two electric motors delivering an additional 283 PS (279 bhp; 208 kW) for a combined output of 899 PS (887 bhp; 661 kW). The 918 Spyder's 6.8 kWh lithium-ion battery pack delivers an all-electric range of 19 km (12 mi) under the US Environmental Protection Agency's five-cycle tests.
Production began on September 18, 2013, with deliveries initially scheduled to begin in December 2013, and a starting price of ~ €611,000 (US$845,000 or GB£511,000).The 918 Spyder was sold out in December 2014 and production ended in June 2015.
The 918 Spyder was first shown as a concept at the 80th Geneva Motor Show in March 2010.On July 28, 2010, after 2,000 declarations of interest, the Supervisory Board of Dr. Ing. h.c. F. Porsche AG, Stuttgart, approved series development of the 918 Spyder. The production version was unveiled at the September 2013 Frankfurt Motor Show. Porsche also unveiled the RSR racing variant of the 918 at the 2011 North American International Auto Show, which combines hybrid technology first used in the 997 GT3 R Hybrid, with styling from the 918 Spyder. The 918 Spyder was the second plug-in hybrid car from Porsche, after the 2014 Panamera S E-Hybrid.
The 918 Spyder is powered by a 4.6-litre V8 engine built on the same architecture as the one used in the RS Spyder Le Mans Prototype racing car without any engine belts.
The engine weighs 135 kg according to Porsche and delivers 608 hp (616 PS; 453 kW) at 8,500 rpm and 528 N⋅m (389 lbf⋅ft) of maximum torque. This is supplemented by two electric motors delivering an additional 279 hp (283 PS; 208 kW). One 154 hp (115 kW; 156 PS) electric motor drives the rear wheels in parallel with the engine and also serves as the main generator.
This motor and engine deliver power to the rear axle via a 7-speed gearbox coupled to Porsche's own PDK double-clutch system. The front 125 hp (127 PS; 93 kW) electric motor directly drives the front axle; an electric clutch decouples the motor when not in use. The total system delivers 887 hp (899 PS; 661 kW) and 1,280 N⋅m (944 lbf⋅ft) of torque. By October 2012, the engineering design was not finalized, but Porsche provided performance figures of 0–100 km/h (0–62 mph) in 2.5 seconds, 0–200 km/h (0–124 mph) in 7.2 seconds, 0–300 km/h (0–186 mph) in 19.9 seconds and a tested top speed of 350 km/h (217 mph). The Porsche 918 Spyder has a power to weight ratio of 1.92 kg (4.23 lb) per horsepower, and the Weissach Package-equipped car has a power to weight ratio of 1.84 kg (4.06 lb) per horsepower.
The energy storage system is a 312-cell, liquid-cooled 6.8 kW·h lithium-ion battery positioned behind the passenger cell. In addition to a plug-in charge port at the passenger-side B-pillar, the batteries are also charged by regenerative braking and by excess output from the engine when the car is coasting. CO2 emissions are 79 g/km and fuel consumption is 3.0 L/100 km (94 imperial mpg/78 US mpg) under the New European Driving Cycle (NEDC).The U.S. Environmental Protection Agency (EPA) under its five-cycle tests rated the 2015 model year Porsche 918 Spyder energy consumption in all-electric modeat 50 kWh per 100 miles, which translates into a combined city/highway fuel economy of 67 miles per gallon gasoline equivalent (MPG-e) (3.5 L/100 km; 80 mpg-imp gasoline equivalent). When powered only by the gasoline engine, EPA's official combined city/highway fuel economy is 22 mpg‑US (11 L/100 km; 26 mpg‑imp).
The 4.6 litre V8 petrol engine can recharge an empty battery on about two litres of fuel.The supplied Porsche Universal Charger requires seven hours to charge the battery on a typical 110 volt household AC socket or two hours on a dedicated Charging Dock installed with a 240 volt industrial supply. An optional DC Speed Charging Station can restore the battery to full capacity in 25 minutes.
The 918 Spyder offers five different running modes: E-Drive allows the car to run under battery power alone, using the rear electric motor and front motor, giving a range of 18 miles (29 km) for the concept model. The official U.S. EPA all-electric range is 12 mi (19 km). The total range with a full tank of gasoline and a fully charged battery is 420 miles (680 km) according to EPA tests. Under the E-Drive mode the car can reach 93 mph (150 km/h). Two hybrid modes (Hybrid, and Race) use both the engine and electric motors to provide the desired levels of economy and performance. In Race mode a push-to-pass button initiates the Hot Lap setting, which delivers additional electrical power. The chassis is a carbon-fibre-reinforced plastic monocoque and the brakes used are electromechanical brakes.
At the 2011 North American International Auto Show in Detroit, Porsche unveiled the RSR racing variant of the 918 Spyder. Instead of using plug-in hybrid technology, power for the two electric motors is provided by a flywheel accumulator KERS system that sits beside the driver in the passenger compartment. The V8 is a further development of the direct injection engine from the RS Spyder race car developing 563 horsepower (420 kW). The electric motors each provide an additional 102 horsepower (76 kW), giving a peak power output of 767 horsepower (572 kW). The six speed gearbox is a development of the unit from the RS Spyder.