The Honda Dualnote (also branded as the Acura DN-X) is a hybrid sports car concept that was initially unveiled at Japan's Tokyo Motor Show in 2001.
The Dualnote was powered by a 3.5 litres (213.6 cu in) double overhead camshaft (DOHC) i-VTEC V6 motor with Honda's Integrated Motor Assist electric hybrid system. This engine setup was estimated to produce 400 horsepower (298 kW; 406 PS) while still being capable of fuel efficiency of approximately 18 km/L (51 mpg‑imp; 42 mpg‑US) (5.6 L/100 km).
References
Honda Dualnote Wikipedia(Text) CC BY-SA