Well, my Hybrid simply sends power from the Battery to the leccy motors when needed. such as climbing hills. There is a nice little display that shows there the power from the battery and engine is being directed.
If my experience of US 2.5L engines is anything to go by, is that they are gutless beyond belief. Their Auto Transmissions seem to make everything just soft and slow and well... crap.
I drove an Chevy Equinox and a Nissan Sentra last week. The Nissan was far more responsive and returned better road MPG. both had 2.5L engines.
What gives eh?