Dongfeng Citroen sega old manual gear 1.6 runs at high speed, which is the fastest and most fuel-efficient?

80 yards. Citroen 1.6 naturally aspirated fuel-saving optimal speed is 80 yards. At this time, the engine speed is only 2000 rpm, and in this state, the matching between the engine and the gearbox is also the most perfect, and the fuel efficiency of the engine is also the highest, so the maximum battery life can be achieved with the minimum fuel consumption. Dongfeng Citroen Sega is equipped with a 2.0L, 16V engine which is also used for triumph, and adopts VVT variable valve timing technology.