Downsized 4.0 TFSI for Audi S8 cuts fuel consumption 23% compared to predecessor; cylinder deactivation and start-stop
Green Car Congress
OCTOBER 11, 2011
This is due in large part to the cylinder-on-demand system, which deactivates four of the eight cylinders in many driving situations. Weighing 220 kilograms (485 lb) including all key add-on parts, the V8 is comparatively light. The control units for the active engine mounts receive their information from two sources.
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