This is an interesting vehicle. And the powertrain choices are even more interesting. At least in the US, the 2 lower trim levels get the 2.5 liter NA engine found in the ES300h and maybe also in the RAV4 Prime and an electric motor for the rear wheels. That combination in Crown form makes 236 hp and has a CVT transmission. It's good for 38 mpg US. That is down from the 44 mpg US that the ES300h makes with FWD and a combined 215 hp. So there's a penalty of 6 mpg US I guess for the slightly more power and the higher ground clearance which probably makes it less aerodynamic. Since the electric motor powers the rear wheels I doubt that the mileage penalty has anything to do with drivetrain losses as would be the case in a traditional ICE vehicle with power being sent to the rear. The top level Platinum trim on the other hand sounds like much more fun, a 2.4 liter turbo engine with 2 electric motors for a total of 340 hp and has it a proper 6 speed automatic transmission. But the penalty is a combined fuel consumption of 28 mpg US, a drop of 10 mpg US over the less powerful engine combo.