Turbos for BMW M models?
The next M5, due out in 2011, is expected to get a twin-turbo V-8 instead of a naturally aspirated V-10, insiders say. Variations of the twin-turbo, 4.4-liter V-8 that powers the X6 premium SUV are on the test stand and generating “400 kW (536hp) and more of output,” an insider said.
A source also said the company has had “good experience with the performance characteristics” of the X6-base engine, a 3.0-liter, six-cylinder biturbo. It comes “very close to a large displacement, naturally aspirated engine,” he said. The 580hp Audi RS6 holds the performance title among German carmakers.