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Originally Posted by High Flier
I think the M4 was actually a twin-power turbo, meaning one turbocharger with two sets of vanes split between the 6 cylinders for a smoother, synchronized boost. The M550i is a true twin turbo.
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It is twin power, but from this it looks like it is twin turbo as well.
Got this from BMW's website.
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M TWIN POWER TURBO INLINE 6-CYLINDER PETROL ENGINE.
The 3.0-litre M TwinPower Turbo inline 6-cylinder petrol engine blends the best of two worlds: a high-revving character capable of up to 7,600 rpm, and superior power culminating in peak torque of 550 Nm. Twin-turbo direct injection and typical M fine tuning make sure the engine responds directly to even the slightest touch of the accelerator with vigorous thrust and confident traction. Numerous innovations such as sleeveless construction or a lighter, forged crankshaft build on the intelligent lightweight construction concept, improve dynamics and acceleration, reduce consumption and enable an optimum axle load distribution of almost 50:50. The reward is unprecedentedly agile handling that’s impressively underscored by the unmistakable sound of the M engine.
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