Audi S8 40V vs A8 4.2 40V

01) Different camshaft profiles.
02) Different ECU.
03) Different pistons (higher CR).
04) Larger intake plenum.
05) Larger throttle body.
06) Larger exhaust manifolds.
07) Larger exhaust ports (different cylinder heads).
08) Different catalysts.
09) Different injectors.
10) Different transmission (lower final drive).
11) Different rear differential (lower final drive).
12) Different MAF.
13) Different airbox.

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