Don has covered it pretty well but there's more to this engine. See in the second generation models the KR engine was the newest in the range and thanks to its size and lightness and efficiency over other options it was the most economical of the range also it was equipped with the auto stop function in the intelligent package. but with the 3rd generation model, with the introduction of the NR engine, it took the lead as the most economical. in the japanese 10-15 mode test it managed 26.5 km/l (which equates to about 17km/l in day to day driving). the 1.0 managed only 23km/l. sure the NR engine features auto stop function but even without it, it does marginally better than the 1.0. and its 69bhp vs. 95 in the NR. so no need to even talk about cross country economy.