This discussion reminds me of how someone in Sheffield, after a brief drive in a Prius, declined to purchase one because, as they put it, “it struggles on hills”, of which Sheffield has plenty.
I found this amusing, having crossed both Sheffield and the Alps a number of times in a fully-laden Prius. Obviously the hybrid system dispenses with the linear relationship between combustion engine revs and road speed which conventional drivetrains deliver (and which motoring journalists seem to be unable to manage without). And the Prius is certainly loud, not to say raucous, under load uphill, as the hybrid system directs engine revs to rise quickly into the peak power and torque ranges. Sometimes under these circumstances the engine’s generating excess power and charging the traction battery simultaneously. But there really is ample power for hill climbing, and the loud noise is not to be confused with that made by a 1-litre supermini being caned in first gear, for example. Struggling it isn’t.
The NX drivetrain so far feels eerily similar, except that it’s of course much quieter right across the operating range. In my limited experience the hybrid system doesn’t send the revs high nearly as often as it does in the Prius, presumably reflecting the NX’s better power-to weight ratio and some software development. On the rare occasions it does, it’s still fairly loud by luxury vehicle standards. But while the NX300h is no rocketship, I can’t believe that with between 76 and 84KW/tonne it’s underpowered. The petrol engine may be a little intrusive on those occasions when it’s operating at high revs, but I’m more than willing to accept those occasions as a trade-off for the 95% of the time that the NX is so much quieter and more refined than its competitors, especially the diesel ones. Others may not be, of course.
Realise this is the mpg thread, so I’ll just say that I’m still on 46 mpg, but haven’t yet finished the first tankful!