Just read about it, don't know if you guys know or not, it is supposed to have the v-10 from the Gallardo, but it is to be de-tuned, but i don't think if the new m5 will but out 500hp then the RS6 should put out the same. they will also offer a S6 that will have the v-8 from the A8 i belive.
Next RS6 is to have a Lambo engine
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