Porsche says the electric motors on the two front wheels each contribute 75 kilowatts to the peak drive power, which clocks in at 767 hp.
More on the flywheel accumulator, in the Stuttgart, Germany-based automaker’s own words:
This flywheel accumulator is an electric motor whose rotor rotates at up to 36,000 rpm to store rotation energy.
the energy can be got into and out of the flywheel faster than it can be with batteries, so the electric kick out of a corner can be bigger. Also, the flywheel is lighter than batteries.
...It won't say when (we hear about two years) or how many (but 2,500 non-binding ‘letters of intent' have been signed by potential customers) or how much it'll cost (er, lots).
Detroit 2011: Porsche unveils 918 RSR - BBC Top Gear
The kinetic energy of the flywheel can then be used with the push of a button by the driver. If the driver needs a little boost coming out of a corner or for a pass, there will be an additional 162 horsepower available for six to eight seconds. While the flywheel power system does provide a power boost, it can also be used to conserve fuel, Peek Inside Porsche’s Super Hybrids | Autopia | Wired.com
