I do know for a fact after spending a day a the Ferrari factory in late September that under no circumstances will Ferrari have anything to do with the Diesel engine but are in joint development with the V6 with Alfa and Maser. In fact the Maserati V8 and 6 are on adjacent production lines with exclusively Ferrari technicians. The fact the V8 has a different crank throw ie 180 as opposed to 90 degrees is the only difference below the head in structural terms.
My view, for what it is worth, is that Maserati have moved their focus to mainstream with E Class and S class alternatives and the Alfieri may be no more than a vision halo car to keep the faithful interested while Alfa is being pushed as the wild kid on the block with the new Guilietta out later this year with rear wheel drive plus the Guilia v6 550 bhp beast. Put that in the same showroom as the new 6C and it could be Maser 10 years ago.
I hope I'm wrong. I retrieved my Alfieri deposit from Meridien who said they can't see the Alfieri until 2018 for deliveries in the UK. It will be so far behind by then even Kia are launching a Grantourer with super car performance soon.