At 25 MPG combined, the 2024 BMW M440i xDrive Convertible is not winning any fuel-sipping contests. However, efficiency is a secondary consideration for those drawn to this blend of sunshine, a strong straight-six engine, and all-weather grip; most buyers gladly accept the compromise. This is a car for spirited weekend drives and making an entrance, not maximizing miles per gallon.

City and highway performance

The EPA rates the M440i xDrive Convertible at 22 MPG in the city and 30 MPG on the highway. These figures are realistic for typical driving scenarios. In urban settings, the stop-and-go nature of traffic will naturally lead to lower numbers, influenced by frequent acceleration and the engine’s need for more fuel during initial takeoff. Out on the open road, the M440i’s smooth eight-speed automatic transmission and the inherent efficiency of a well-tuned inline-six contribute to the respectable highway figure, especially when using cruise control.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2024 BMW M440i xDrive Convertible will be $2,300. This figure is based on driving 15,000 miles per year, using prevailing national average fuel prices, and the car’s officially-rated fuel economy. Individual fuel expenses will vary based on local gasoline costs, driving habits, and the proportion of city versus highway miles driven. However, $2,300 provides a solid benchmark for budgeting purposes if you’re considering an M440i Convertible.

Real-world expectations

While the EPA numbers provide a useful baseline, expect some variation in the real world. A heavy foot will quickly decrease fuel economy. Conversely, using a smoother driving style, anticipating traffic flow, and easing into acceleration, all things that can be hard to remember in a car like this, can nudge you closer to, or even slightly above, the EPA estimates. The type of fuel you choose will also have effects. The M440i rewards its driver with performance for using higher octane fuel.

How it compares

In the realm of luxury convertibles, the BMW M440i xDrive exists in a competitive field. The Audi S5 Cabriolet, with its turbocharged V6 and quattro all-wheel drive, achieves a similar 24 MPG combined in EPA testing. The Mercedes-AMG C43 Cabriolet with its performance-oriented engine delivers 21 MPG combined. The Porsche 718 Boxster, emphasizing lightness and handling, manages 24 MPG combined. Keep in mind that for many drivers, the Porsche is rear-wheel drive.

The slight differences in MPG, which you can consult M440I MPG across all years, often take a back seat to factors like brand preference, styling, and driving dynamics for buyers in this segment. In that group, the M440i xDrive’s balance of performance, luxury, and year-round usability thanks to its all-wheel drive likely carries more weight than a single or two MPGs different.

Tips to maximize efficiency

Engage Eco Pro mode within the driving settings. This softens throttle response and optimizes transmission shift points for improved fuel conservation. It’s a quick way to reduce fuel consumption during routine commutes or when driving isn’t the primary focus.

Monitor your tire pressure regularly. Under-inflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Consult the sticker on the driver’s side door jamb for the recommended pressure and maintain it consistently, for best results.

Avoid unnecessary idling. If you’re stopped for more than a minute, especially in warmer outdoor conditions, turn off the engine. Modern BMWs start up quickly and use efficient stop-start systems to minimize fuel waste at traffic lights. Idling is essentially zero MPG.

Use cruise control on the highway whenever appropriate. Maintaining a consistent speed minimizes fluctuations in throttle input, leading to more efficient fuel consumption. Be mindful of traffic conditions and avoid excessive braking to stay efficient.

Service your vehicle according to its maintenance schedule. Replacing air filters, spark plugs, and adhering to oil change intervals keeps the engine running at peak efficiency. Neglecting maintenance typically leads to reduced performance and poorer fuel economy. Review all Bmw fuel economy data to look at any patterns over time.