Any chance Autoweek is a BS source?
Quote:
Both cars will be powered by the same twin-turbocharged inline six-cylinder direct-injection gasoline engine. The 3.0-liter unit is based around the German carmaker's familiar N55 engine, with 84.0 mm bore and 89.6 mm stroke measurements. BMW's M division said that the changes to the aluminum block, cylinder head, induction and exhaust systems and internal architecture are enough to classify the engine as all-new.
http://www.autoweek.com/article/2013...NEWS/131209865
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