BMW 840i xDrive Convertible Fuel Economy History

MPG by year — EPA official data.

Best MPG Year

2026

24 MPG combined

Latest Model

2026

24 MPG combined

Year	Engine	City	Hwy	Combined	Fuel Cost/yr
2026	Premium	21	29	24	$3,400	Details →
2025	Premium	21	29	24	$3,400	Details →
2024	Premium	21	29	24	$3,400	Details →
2023	Premium	21	29	24	$3,400	Details →
2022	Premium	20	27	23	$3,550	Details →
2021	Premium	20	27	23	$3,550	Details →
2020	Premium	20	27	23	$3,550	Details →