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      01-09-2013, 07:22 AM   #6
Terpinator
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Drives: 550i xDrive M Sport
Join Date: Feb 2012
Location: The Hague

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Audi's new 4.0L V8 used in the S6, S7 and S8 has cylinder deactivation, where they run on 4 cylinders when under light load. They have to use active sound management and active engine dampers to quell unwanted vibrations and noise when operating on 4 cylinders.

I'll take BMWs valvetronic approach.