During our 200-mile highway fuel-economy test, the roadster delivered 35 MPGe and went for 22 miles on electricity alone. Despite the i8's focus on design versus practicality, front-seat...

11 BMW i8s have provided 85 thousand miles of real world fuel economy & MPG data. Click here to view all the BMW i8s currently participating in our fuel tracking program.

Sep 2, 2025 · Details: A reviewer reported achieving an average of 44 MPG during highway driving. Electric-only range was around 34 miles, and long trips were possible without frequent recharging.

Compare the gas mileage and greenhouse gas emissions of the 2020 BMW I8 Roadster side-by-side with other cars and trucks.

The BMW i8 coupé had a fuel efficiency of 2.1 L/100 km (134.5 mpg ‑imp; 112.0 mpg ‑US) under the NEDC test with carbon emissions of 49 g/km. The EPA rated the i8 combined fuel economy at 76 …

The forceful supercar BMW i8 has a monstrously portrayed fuel tank with a capacity of 11.1 gallons (42litres). The 1.5L double overhead camshaft turbo 3-cylinder motors backed by a 98 KW, 131bhp …

When you’re cruising around town and run on electric power alone, the BMW i8 can travel roughly 15 to 18 miles before the gasoline engine kicks in. This figure may vary a bit depending on factors like …

View detailed gas mileage data for the 2020 BMW i8. Use our handy tool to get estimated annual fuel costs based on your driving habits.

Sep 26, 2025 · Fuel Efficiency: The BMW i8 averages about 76 MPGe (miles per gallon equivalent) when using electric power and roughly 29 MPG when running on gasoline. This efficiency can vary …

Nov 1, 2021 · As the i8 has a theoretical electric range of 34 miles at up to 75mph, the petrol engine need not operate at all for much of the measured cycle. In real-life driving, you may experience fewer...