In contrast to Sport Hybrid mode, the electric motors run at their maximum power output limits for a short time, thus ensuring better boosting. In this mode, the battery charge state is not kept constant, but instead fluctuates across the entire charge range. The electric motors are used up to the maximum power output limit in order to provide the best possible performance for the race track. The electric motors provide additional support as necessary in the form of a boost when the driver requires even more power. The combustion engine is chiefly used under high load, and charges the battery when the driver is not utilising the maximum output. “Race Hybrid” is the mode for the highest possible performance and especially sporty dri- ving style. The focus of this mode is on performance and a sporty driving style. In addition, the electric motors provide support in the form of an electric boost when the driver demands higher output, or if there is scope to optimise the operating point of the combustion engine for greater efficiency. The combustion engine is now in constant operation and provides the main propulsive force. In more dynamic situations, the 918 Spyder selects the “Sport Hybrid” mode for its motors. The hybrid mode is typically used for moderate, consumption-orientated driving styles, e.g. The use of the individual drive components adapts depending on the current driving situation and the desired performance. In “hybrid” mode, the electric motors and combustion engine work together with the focus on maximum efficiency and minimum fuel consumption. If the charge state of the battery falls below a set minimum value, the vehicle automatically switches to hybrid mode. In this mode, the combustion engine is only used when needed: maximum engine power is available at a moment’s notice by means of the kick-down function. In ideal conditions, the 918 Spyder can cover more than 25 kilometres on purely electric power. When the vehicle is started up, the “E-Power” mode is the default operating mode as long as the battery is sufficiently charged. The following is taken directly from Porsche's press briefing document on the latest version of the Porsche 918 Spyder: Quiet and elegant: “E-Power” In order to make the best possible use of these different approaches, the Porsche developers defined a total of five operating modes that can be activated via a “map switch” in the steering wheel, just like in motor sports cars. It takes the best possible account of the different requirements between an efficiency-orientated driving profile on the one hand and maximum performance on the other. This operating strategy is a core competency of the 918 Spyder. Harmonizing 770 bhp from three different power units is likely to be a strength of Porsche's thanks to its extensive race testing of the 911 GT3 R Hybrid, and the intelligent management system which choreographs the three units using five pre-selectable modes. However, the uniqueness of the 918 Spyder is likely to be the drivability offered by the intelligent combination of three power units. The Spyder's time of less than three seconds from zero to 100 km/h bests the Carrera GT by a full second (Carrera GT = 3.9 seconds) and a Nürburgring Nordschleife lap time of 7:22 minutes is a full ten seconds faster than the Carrera GT.
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