TYhe Austr Engine derives from the 3.0l MONOBLOCK Steyr engine (used in marine and other specailist )applications. It seems to be a superior design to THielert , stroger block/head, better thermal efficiency and has the "Pumpe-Duese" INjection system which is more tolerant to abuse and contaminated fuels as well that it has a mechanical "get home setting (in case of electronics failure) of 50-60%..at least the marine versions do....I would bet my $ on thire design to be the less costly to operate..pending gearbox times/