The key area of innovation for me is the swapping around of the inlet and exhaust ports. This is very unique, I can't ever recall a V-configuration engine where the exhaust manifolds are located centrally with the inlet systems being located on the outside of the cylinder banks - regardless of forced induction or not.

I'd like to understand the heat soak implications from locating to turbos so closely together. In fact, despite its unique configuration, I don't can't see any logical reason to locate the induction and exhaust systems in such a fashion other than for reasons of engine bay packaging.

All I can say is, after a hard drive, don't go touching the hood.

Sidenote; I think the xDrive50i and xDrive35i nomenclature is stunningly daft.