← all 2021 BMW 840i xDrive Coupe trims
2021 BMW 840i xDrive Coupe — 3.0L 6-cyl, S8 automatic, AWD
This 2021 BMW 840i xDrive Coupe (3.0L 6-cyl, S8 automatic, AWD) takes premium gasoline. PREMIUM
23
MPG combined (20 city / 27 hwy)
$3,350
est. fuel cost / year (EPA, 15k mi)
387 g/mi
tailpipe CO₂
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
EPA fuel type: Premium · class: Subcompact Cars · retrieved 2026-06-14.