27 MPG combined is a curious data point for the 2020 BMW i8 Coupe. It’s not particularly impressive for a car with a tiny 1.5L 3-cylinder engine, especially one augmented by electric motors. The i8 isn’t about outright efficiency, it’s about making a statement. It’s a technologically advanced halo car designed to showcase BMW’s vision of the future, and for that mission, the MPG figure is almost irrelevant. Buyers of the i8 are far more interested in its striking design, its plug-in hybrid capabilities, and its futuristic driving experience than they are in squeezing out every last mile per gallon. They accept the middling fuel economy as a compromise for owning a car that looks like nothing else on the road, and accelerates with surprising urgency thanks to its electric boost.

City and highway performance

The EPA ratings offer a glimpse into how the i8 performs in different driving environments. The 26 MPG city rating reflects the stop-and-go nature of urban driving, where the electric motor can contribute more significantly to propulsion, reducing reliance on the gasoline engine. The 29 MPG highway figure, while better, isn’t dramatically higher, suggesting that the gasoline engine plays a larger role at higher speeds. The i8’s aerodynamics and lightweight construction help it maintain relatively consistent fuel economy across both scenarios. However, these numbers don’t fully capture the i8’s potential for efficiency, as they don’t account for the possibility of driving solely on electric power for shorter distances. The all-electric range, while limited, can significantly impact overall fuel consumption for drivers with shorter commutes who regularly charge the battery.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW i8 Coupe at $2,150. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s important to remember that this is just an estimate, and your actual fuel costs will vary depending on your driving habits, fuel prices in your area, and how often you use the i8’s electric capabilities. Drivers who frequently charge their i8 and drive primarily on electric power will likely spend significantly less on fuel. Conversely, those who rely heavily on the gasoline engine and drive more aggressively will likely exceed the $2,150 estimate. For most i8 owners, this cost is a secondary consideration compared to the car’s design, performance, and technological appeal. You can see all BMW fuel economy data here.

Real-world expectations

While the EPA figures provide a useful benchmark, real-world fuel economy for the i8 can vary considerably. Drivers who prioritize electric driving and take advantage of regenerative braking can often exceed the EPA estimates, especially in city driving. Aggressive driving or extended highway trips with limited opportunity for electric assistance will inevitably result in lower MPG. Factors like ambient temperature, tire pressure, and even the weight of cargo can also influence fuel consumption.

Achieving optimal fuel economy in the i8 requires a conscious effort to maximize electric driving and adopt efficient driving habits. Understanding the vehicle’s hybrid system and its various driving modes is crucial for extracting the best possible MPG. For more on this car, view I8 MPG across all years.

How it compares

Compared to other sports cars and plug-in hybrids, the i8’s fuel economy presents an interesting picture. The Porsche 911 Carrera, a more traditional sports car, typically achieves around 21 MPG combined. The Acura NSX, another hybrid sports car, delivers a combined EPA of 21 MPG. The i8 outperforms both of these.

Comparing it to other plug-in hybrids reveals its unique positioning. A BMW 330e Sedan delivers 28 MPG combined near its best, while offering a more spacious and practical interior. The Mercedes-Benz GLC 350e SUV gets around 25 MPG combined. While vehicles such as the Toyota Prius Prime can achieve significantly higher MPG ratings, they lack the i8’s performance capabilities and exotic styling. The i8’s fuel economy is a trade-off accepted by owners seeking its specific blend of performance, technology, and head-turning design. It prioritizes making a statement over achieving Prius-like levels of efficiency.

Tips to maximize efficiency

Take advantage of the i8’s electric driving modes whenever possible. Short trips and city driving are ideal situations for maximizing electric range, reducing reliance on the gasoline engine. Familiarize yourself with the different driving modes, such as “Comfort,” “Eco Pro,” and “Sport,” and select the appropriate mode based on driving conditions and desired performance. Select “Eco Pro” for longer highway stretches.

Use regenerative braking effectively. By gently lifting off the accelerator, you can recover energy and recharge the battery, extending your electric range and reducing fuel consumption. Avoid sudden braking whenever possible to maximize regenerative braking. Learn to anticipate traffic flow and use the momentum of the car to your advantage.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure specified in your owner’s manual. Use a quality tire pressure gauge for accurate readings.

Minimize aggressive acceleration and hard braking. Smooth, consistent driving habits are crucial for achieving optimal fuel economy. Avoid excessive speeding, rapid acceleration, and abrupt braking, as these actions consume more fuel and deplete the battery more quickly. Anticipate traffic conditions and maintain a steady pace.

Precondition the cabin while the car is plugged in. Use the i8’s preconditioning feature to heat or cool the cabin while the car is plugged in, rather than relying on the gasoline engine to do so. This can significantly reduce energy consumption, especially during extreme weather conditions. Preheat when plugged in before departure.