NEVER...hopefully.....
We needed an RX225h and got....
Doesn't Lexus raise their number designations only when they put bigger motors in their cars? ... is that why the assumption of a larger (450h) number? Our 400h has more power than it needs, so I'd hope they could make one with a smaller / more fuel efficient ICE / more electric version IMO.
Yes they do and the rumor is that they will be putting the new engine in the model redesign. It will be the same engine as the GS 450h.