The new Porsche 918 Spyder is a high-performance hybrid with an incredible mix of performance and low-emission motoring.

Porsche say the 918 Spyder provides the blueprint for future models, and is the result of a number of developments honed in the company’s motorsport activities, such as with the LMP1 race car for Le Mans.

The 918 Spyder is powered by a 4.6-litre V8 engine developing 608 hp, based on that used in the RS Spyder endurance race car.  The power-plant delivers 132 hp per litre – 26 hp per litre more than the Carrera GT – and revs up to 9,150 rpm.

It is joined in the engine bay by a 115 kW electric motor, coupled in parallel to the petrol engine.  This parallel connection allows the rear axle to be driven either by the engine, motor, or a combination of the two.

Power is transmitted to the rear axle through a seven-speed PDK transmission.

An additional 95 kW electric motor drives the front axle via a fixed gear ratio and a de-coupling device that disconnects the motor at high speeds.

Power for the electric motors is stored in a 312-cell 6.8 kWh liquid-cooled lithium-ion battery, which can be charged via a conventional mains socket in four hours, or in just under 25 minutes via an optional Porsche Speed Charging Station.

Combined, the engine and motors provide a total of 887 hp at 8,500 rpm, and peak torque of 917 – 1,280 Nm depending on the gear ratio.

That’s enough to whip the 918 from 0 to 62 mph in just 2.8 seconds, and on to a top speed of 214 mph.

However, these are not the most surprising figures the 918 Spyder has to offer.  The 918 Spyder emits just 70 – 79 g/km of CO2, and boasts an economy figure between 85 to 94 mpg.

It can drive on the electric motors only at speeds of up to 93 mph, with a maximum electric-only range of 10 to 20 miles.

Five driving modes are available – E-Power, Hybrid, Sport Hybrid, Race Hybrid and Hot Lap – offering varying degrees of performance and mixture of power sources.

Sources suggest no more than 918 examples will be made, each with a price tag of over £657,000.