2019 BMW I8 Roadster MPG & Specs — Real Fuel Cost
Quick answer
The 2019 BMW I8 Roadster gets an EPA-estimated 26/29 MPG (city/highway) and 27 MPG combined, with an estimated $2,800/year fuel cost and 191 g/mi CO₂. Engine: 1.5 L 3-cyl.
The 2019 BMW I8 Roadster with the 1.5-liter 3-cylinder premium gasoline engine returns an EPA-estimated 26 MPG in the city and 29 MPG on the highway, for a combined 27 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 1.5 L 3-cyl |
| Transmission | Automatic 6-spd |
| Drive | All-Wheel Drive |
| Fuel type | Premium Gasoline |
| Vehicle class | Two Seaters |
| MPG — city | 26 |
| MPG — highway | 29 |
| MPG — combined | 27 |
| Annual fuel cost* | $2,800 |
| CO₂ tailpipe | 191 g/mi |
| EPA GHG score | 10/10 |
| Electric range | 320 mi |
How efficient is it?
With a combined 27 MPG, the 2019 BMW I8 Roadster sits in the good range for fuel economy. That is about 34% better than the typical Two Seaters of its era (20 MPG class average), making it one of the more efficient choices in its class.
Fuel economy and running costs
At about $2,800 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 2019 BMW I8 Roadster. Over five years that is roughly $14,000 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 2019 BMW I8 Roadster emits approximately 191 grams of CO₂ per mile at the tailpipe, earning an EPA greenhouse-gas score of 10 out of 10. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.