I had the pleasure to ride the Centauro for a few years and I know first hand what the 8valve engine can - and can't do.
With a chip, crossover and cone filters it showed 90hp on the dyno and could outdrag my cousin's V11Lemans anywhere.
What it couldn't do is idle, electrics working, shift without kung-fu kicks or make less noise from the clutch than the exhaust.
First time I rode the V11Lemans I could clearly see that it was a generation ahead in every respect but power.
I always wondered why Guzzi could not improve on that 12year old design they already had and introduce it in the new bikes. All it needed is a good injection, gearbox and voila.
I suppose they have their reasons.