- Start-stop and regen.
- It depends
- All custom work using OEM components
It appears that this would be classed as a
mild hybrid. An ICE with a belt-driven altermotor to enable start-stop (and parking maneuvers), regeneration and load balancing (20hp on tap and it saves your brakes).
Everything else I know is in that thread, but you could compare the performance of the hybrid and non-hybrid versions of the E-assisted vehicles. Honda's IMA system may be similar.