BMW 840i Convertible MPG and Fuel Economy

BMW have been manufacturing models of 840i Convertible for 4 years, with the latest vehicle in 2023 having a combined MPG of 24.

The estimated fuel cost for the 2023 BMW 840i Convertible is $3,100 per year.

Government regulators have estimated that value based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

💵 Compared to an average vehicle over 5 years, you will spend $4,000 more on fuel driving a 2023 BMW 840i Convertible.

🛢 The BMW 840i Convertible will consume roughly 12 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

💨 For every mile driven, the BMW 840i Convertible will emit 374 grams of CO₂, which is about 5,610,000 grams of CO₂ per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO₂ per year. This means that roughly 268 trees would be needed to offset emissions from the BMW 840i Convertible.

The table below is a complete list of the 4 BMW 840i Convertible fuel efficiency specifications we have data for.

Click any vehicle link to see a more detailed breakdown of the car, miles per gallon, emissions, and more.