Lift your days, light up your nights. The first-ever BMW i8 Roadster. BMW i __________ The BMW i8 Roadster: Energy consumption (combined): 14.5 kWh/100 km Fuel consumption (combined): 2.0 l/100 km CO2 emissions (combined): 46 g/km Fuel consumption is determined in accordance with the ECE driving cycle (93/116/EC), made up of approximately one-third urban traffic and two-thirds extra-urban driving (based on the distance covered). Further information about the official fuel consumption and the off