onetrack
You seem to be a trifle selective when quoting the specs on the Toyota (Prius) 1NZ-FXE engine.
From that fountain of "undisputed" information - Wikipedia:
The net result is that the engine has a greater effective expansion than compression—making it a simulated Atkinson cycle, rather than a conventional Otto cycle.
The reduction in cylinder charge means reduced torque and power output, but efficiency is increased. This combination makes the 1NZ-FXE suitable for use with the Hybrid Synergy Drive, where peak torque and power are of less importance.
Probably not a suitable engine technology for use in an aircraft.