On this episode of The Downshift, we head to the Nürburgring where Porsche's engineers are testing the upcoming 918 - an 800-plus horsepower, mid-engined, plug-in hybrid supercar. We talk with the people responsible for bringing the world's most exciting hybrid to fruition, and find out why the Nürburgring is Porsche's ideal choice for testing the performance limits of their hybrid technology.

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