27 MPG combined won’t win any hypermiling contests, but it’s a perfectly respectable figure for the 2021 BMW 230i Convertible. Buyers aren’t drawn to this car for its fuel sipping abilities. Instead, they prioritize open-air fun, BMW’s signature driving dynamics, and a dose of premium style in a compact package. The fuel economy is simply acceptable enough to avoid serious buyer’s remorse at the pump.

City and highway performance

The EPA estimates for the 2021 BMW 230i Convertible powered by the 2.0L turbocharged four-cylinder engine are 23 MPG in the city and 33 MPG on the highway. The difference reflects what you’d expect: stop-and-go driving and lower average speeds negatively impact fuel consumption compared to consistent highway cruising. Drivers who primarily use this vehicle for commuting in dense urban environments will likely see figures closer to the city estimate, while those who frequently embark on longer road trips with the top down will benefit from the highway number. The smooth-shifting eight-speed automatic transmission undoubtedly contributes to achieving these figures, keeping the engine in its optimal power band for both performance and efficiency.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2021 BMW 230i Convertible is $2,150. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. Of course, actual fuel costs will vary depending on individual driving habits, fuel prices in your region, and the type of gasoline used. While the 230i doesn’t explicitly require premium fuel, BMW recommends it for optimal performance, which can impact the overall cost of ownership. Consider that the $2,150 figure is a standardized benchmark, not a guarantee.

Real-world expectations

While the EPA estimates provide a useful baseline, real-world MPG in your 2021 BMW 230i Convertible will depend on a variety of factors. Aggressive driving, frequent short trips, extended idling, and even tire pressure can all influence fuel consumption. Don’t be surprised if your average isn’t exactly 27 MPG. However, drivers who adopt a smoother driving style, adhere to recommended maintenance schedules, and minimize unnecessary weight in the vehicle can reasonably expect to achieve numbers close to the EPA estimates. Regular monitoring of your fuel economy will give you a good baseline of your car’s long-term efficiency. Also check 230I MPG across all years for year-to-year comparisons.

How it compares

The 2021 BMW 230i Convertible occupies a specific niche, and direct competitors are relatively few. The Mazda MX-5 Miata, for example, offers slightly better fuel economy (26 MPG city/34 MPG highway for the automatic transmission) and a similar ethos of open-top driving fun, but with a considerably less powerful engine and a more focused driver experience without backseat space. The Audi A3 Cabriolet, while discontinued after 2020, offered similar levels of luxury and performance, and roughly equivalent fuel economy (around 26 MPG combined). The Mercedes-Benz C300 Cabriolet, a larger and more expensive convertible, delivers similar fuel economy (around 25 MPG combined) to the BMW 230i, but at a larger footprint and higher price point. The BMW’s combination of reasonable fuel economy, performance, and size makes it a great option for buyers who want a practical and entertaining convertible. For a better look at all Bmw fuel economy data, be sure to check out the full catalog.

Tips to maximize efficiency

Adopt a smooth driving style. Avoid aggressive acceleration and hard braking, as these actions burn extra fuel. Anticipate traffic flow and maintain a steady speed whenever possible. The 2.0L turbo engine is responsive enough to negate the need for slamming the accelerator, gentle pedal control pays dividends at the pump.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and reducing fuel economy. Check your tire pressure regularly and inflate them to the recommended level specified on the doorjamb sticker.

Reduce unnecessary weight. Carrying extra cargo in the trunk or passenger compartment increases fuel consumption. Remove any items you don’t need to lighten the load and improve efficiency. The 230i is already a relatively light vehicle, so even small weight reductions can make a difference.

Minimize idling. Idling wastes fuel and contributes to emissions. If you’re stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, so there’s no need to let it run unnecessarily.

Take advantage of the driving modes, if equipped. The 230i may offer different driving modes like “Eco” or “Comfort” that prioritize efficiency and reduce throttle response. Experiment with these modes to see if they improve your fuel economy without sacrificing too much driving enjoyment.