BYD cites combined range of up to 1,105 km on gasoline and 805 km on ethanol; the GL offers about 57 km of electric-only driving and the GS about 72 km. On BYD’s figures, combined range reaches up to 1,105 km using gasoline and 805 km using ethanol, reflecting ethanol’s lower energy density. A flex-fuel hybrid is a clear signal that the company intends to compete on the incumbents’ home turf, not just sell imported electric models. How much does the BYD Song Pro flex hybrid cost? BYD cites a combined range of up to 805 km using ethanol and up to 1,105 km using gasoline.