what does all hybrid mean

"All hybrid" isn't a strict engineering term; it's marketing shorthand meaning a model line or brand is offered only with hybrid powertrains.

A hybrid pairs a petrol engine with an electric motor and battery to cut fuel use and emissions without needing a wall socket.

There are flavours: mild hybrid (assists, but can't drive on electricity), full hybrid/HEV (can creep about on EV briefly), and plug‑in hybrid/PHEV (larger battery you charge for meaningful EV range).

So when you see "all hybrid", expect every variant to be some flavour of hybrid—just check the brochure for exact fuel, power and range figures.