Absolutely correct.It's fooling of consumer when sub litre engine gets over 7L/100km
The less power per litre of total chambers capacity, the less toxic and non toxic emissions.
In HSD the M2 electric motor nullifies the need for air charging. In that sense it's pretty easy increasing the efficiency of the engine. Not only that, but the ecvt keeps the engine rpm at most efficient point ALL THE TIME.
Toyota HSD cars are the most environmentally friendly cars with ICE, by a mile!