Porsche's fuel-efficient future

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"What we have shown in Switzerland is not only a concept car," said Detlev Von Platen, chief executive of Porsche Cars North America. "It is a clear prototype."

In fact, Porsche already has lined up buyers for a future production version of this super sports car.

"If the business case is OK for us, and we're assuming it will be OK, we will produce this car," Von Platen said.

Cars like this will be expensive, of course, Von Platen conceded. Porsche buyers are willing to pay a premium for the latest technology, he said. The one thing they aren't willing to compromise on is performance.

"We want to keep, for the consumer, the performance and agility of a Porsche," Von Platen said.

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