The new engine will also feature a hosts of new technologies which include a central injector mounted directly adjacent to the spark plug, a central oil feed to the crankshaft, a variable-pressure composite oil pump and scavenge pump, forged lightweight pistons from a Formula 1 supplier, a very high compression ratio. Another technology which will be included and also a Porsche first; variable valve timing with intake and exhaust phase stepper motors.
Even though there are much revisions done on the engine that will be used on the car, the engine is still based on the V8 originally developed for the RS Spyder LMP2 race car which has proven itself in endurance racing.
Another change is the dimensions of the car. The length will increase by 5.8 inches and its width will increased by half an inch. The car will use a liquid cooled lithium-ion battery to power-up the electric motors. It can be charged through a conventional domestic type socket and it will take around 3 hours to fully recharge the motors.
With a dry weight of 1675 kilograms, the 918 Spyder will have a power to weight ratio of 2.15kg/bhp (465bhp/tonne). And, by comparison, the Lamborghini Aventador has a 2.25kg/bhp power to weight ratio. On paper, these figures do not mean much. Only time will tell what sort of performance the 918 Spyder is capable of.
Photo credit: Net Car Show