BMW i3 120Ah: real kWh per mile and charging cost
The BMW i3 120Ah consumes 0.290 kWh per mile in real-world UK driving (3.45 miles per kWh), versus an official figure of 4.33 mi/kWh.
Charging and efficiency figures
- Real-world efficiency: 3.45 mi/kWh
- Official efficiency: 4.33 mi/kWh
- Battery (usable): 42 kWh
- Real-world range: 145 miles
- Official WLTP range: 182 miles
- Annual home-charging energy (10,000 mi): 2,899 kWh
- Annual home-charging cost (8.5p/kWh off-peak): £246
On a 7kW home charger and an EV-friendly off-peak tariff (around 8.5p/kWh), 10,000 miles costs roughly £246 per year — about 21 pounds a month.