I saw it in person and could not believe how small it was. It really didn't look any bigger than a 2 cylinder 2 stroke but it was somewhat taller. I know nothing about 4 stroke design and theory but comments I overheard from people that sounded like they did were really amazed with this 4 stroke and made specific comments on the quality parts used and the engineering. Add another cylinder and we are looking at over 200hp stock As a side note, the current size seems to fit right into a stand up hull. Even the 110hp non intercooled version is plenty for a stock stand up and I can't imagine the 150hp intercooled version in an Octane. That would be outrageous!