Turbos, biturbos, triturbos, superchargers and the rest Which engine charging approach is best?

Aufladungskonzepte, SPA 10/15, Porsche 911 Turbo Zoom Photo credits:
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The turbines in both exhaust turbochargers feature variable geometry which must be especially heat resistant to be used in petrol engines. With each cylinder weighing in at 633 cc, it is dramatically bigger than the optimum, and relatively near to the limit.

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