Watched that video, wasn't impressed -- comparing 1.6L engines in various states of tune with 211/230/300 didn't prove much. VVT made the least difference.
I'd consider the boxer four from the 1930s with 25-60HP. A newly designed engine case[s halves] with the freevalve technology built into it and oil-cooled flat heads producing 230-300HP would be acceptable. Especially if it would weigh less. No throttle body and improved emissions just the gravy with a cherry on top.
edit: Almost forgot
Maybe a VR-12 flat motor?
Quote:
Originally Posted by Wikipedia
Design
See also: Flat engine
Unlike most flat-twin, flat-four, and flat-six engines, flat-twelve engines typically use the crankshaft configuration of a 180° V engine. Instead of the boxer engine design of each piston having its own crankpin, flat-twelve engines have each pair of pistons sharing a crankpin, and thus are flat, but not boxers.
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