BMW i8 Coupe range, MPG, CO2 & charging

Despite the BMW i8 Coupe’s performance, it delivers comparable range to many more conventional plug-in hybrid family cars

Economy CO2 Electric range Wallbox charge time
135mpg 49g/km 23 miles 3 hrs (3.7kW)

The i8 range consists solely of this Coupe and the Roadster, but due to some differences in their construction and therefore weight, this hardtop Coupe model is slightly more efficient. That means no matter what specification and options you choose, you don’t pay a penalty when it comes to fuel economy, CO2 emissions, range or recharging times.

BMW i8 Coupe range, MPG & CO2

We’ve already mentioned the BMW i8 is in a class of one, but compared with its hybrid rivals listed above, the German machine’s claimed fuel economy of 158.9mpg and CO2 emissions of just 42g/km are extremely impressive.

Of course, that’s on the proviso that you plug the car in and keep the battery topped up. Otherwise, you’re carrying around a heavy battery pack and an electric motor that’s not really supplying much thrust – with just the 1.5-litre petrol engine to supply power this saps efficiency.

The battery pack will never be fully depleted though, as the car’s systems will recharge it on the move – either by using the engine as a generator to top it up or by harnessing energy when braking that would otherwise be wasted. That front-mounted electric motor works in reverse here to force energy back into the battery.

Even if you don’t plug the car in religiously, you’ll still get around 40mpg average fuel economy – compare this to other hybrid sports cars like the Honda NSX, or conventionally powered petrol performance machines, such as the Porsche 911, and the BMW’s real-world efficiency is certainly impressive.

Charge time

The i8 comes as standard with a five metre three-pin charging cable to connect it to a conventional home socket, as well as a Type 2 cable for AC faster charging capability. If your only option is to plug into a conventional socket then from empty it’ll take less than four and a half hours to fully charge the 11.6kWh capacity battery.

The Type 2 cable can pump energy into the battery at a faster rate when connected to a 3.6kW fast charger, which will charge the battery fully in less than three hours. BMW’s 360 Electric programme offers a number of different charging options for your home with its different i Wallbox options, starting from £570.

Of course, you can charge the battery on the move as well. In Sport mode more energy is forced into the battery than in Comfort or Eco Pro modes, while you can also opt to hold the state of battery charge for use when you get to a built-up area.