Originally posted by Kent J
AMS writes about V10 and V8 in the Audi R9 (not S9 or LeMans).

Top version: V10, 450hp
Entry version V8, unknown.

http://www.automotorundsport.de/d/82331
AMS have it wrong most of the time and R9 is not a Audi typology/characterization like A9, S9 and RS9.
And why put a heavy 450 hp tunedown V10 engine in it while you have a lighter 420 hp V8 FSI.
The base V8 engine will be the new 345 hp 4.2 FSI engine.

wfg, Hans.