31MPG highway, even though it
31MPG highway, even though it is AWD (electrically driven), .. that is not impressive at all for an Atkinson cycle engine. It should be in the high 30s IMO. It's not even as good as the crappy Subaru Crosstrek hybrid of 34MPG highway, and that does not have an Atkinson cycle engine in it, just regular OTTO cycle.
Prius V is 44MPG. CRV highway is better at 33 highway.
Why is the engine thermal efficiency so unimpressive Toyota? The Prius is 40%, 55-60MPG is easily achievable.