One of the annoyances of the #FordKuga, which I suspect applies to all hybrid vehicles, is that the engine note is completely misleading.
The engine kicks in at unexpected times and at high revs that do not match the motive power being applied at all. If you are used to listening to engine note as a signal of when to change gear on a vehicle with manual transmission and liquid fuel, it is very jarring.
(Presumably it is running the engine at an optimal point on its power curve, which is of course one positive aspect to this.)
With a fully electric vehicle, there's no engine note and no problem. This is one of the in-between-two-stools things that is unique to hybrid vehicles.
