Без заголовка
Во второй ссылке есть сравнение энергоэффективности, тойота приус почти в 4 раза круче.
Toyota Prius COT = about 0.08
Human COT = about 0.2 (a bit better than Ranger)
Asimo COT = about 2 (54 kg@ 1.5 m/s, 1.8 kW)
BigDog COT = about 15 (12.8 miles, 4 gal gas, 110 kg)
(Asimo and BigDog are both much more capable than Ranger in all ways but for energy effectiveness.)