The problem with battery electric and fuel cell cars is gasoline. Petrol is genuinely a superior fuel, at least in terms of energy. It has so much energy per gallon, 116,000 btu/gal, that we can use it in an engine whose theoretical maximum efficiency is only 37%. That means that with all the gizmos a modern gasoline powered internal combustion engine has that increase fuel economy, still two thirds or more of the energy in the fuel is being turned into unusable heat, not motive force.

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It’s been 16 years since Porsche competed at the top level of endurance racing at LeMans and it’s been 37 years since a factory Porsche in the LeMans race was powered by a four cylinder engine. Porsche returns to the la sarthe circuit this year with a factory LeMans prototype team, campaigning a car that features a four pot engine, only this time their race car will have something no Porsche car has had at LeMans before. That four cylinder engine will be augmented with a hybrid powertrain. So far Audi and Toyota have raced hybrid prototypes at LeMans. The new Porsche race car will be called the 919, a nod to the hybrid 918 production supercar and to the legendary 917 that gave the company its first overall victory at LeMans in 1970.

“The vehicle name 919 hybrid follows on from the tradition of the Le Mans-winning 917, but it is also with a view to the 918 Spyder, and acknowledges the company’s embarkation into the hybrid future,” Porsche R&D boss Wolfgang Hatz said in a statement. (Read More…)