Makes BMW8 Series

BMW 8 Series MPG

Its best-rated version reaches 25 MPG combined in 2020–2022, the 840i Convertible. Its weakest year peaked at 13 MPG (1991–1993).

lowest to best versionbest versionmedian of its classengine list turned over

625.0 gal

a year at 15,000 miles for the best 2026 version, the 840i Convertible. Put it next to its 1991 predecessor, at your own mileage.

Compare in gallons

The BMW 8 Series has EPA ratings for 15 model years, 1991–2026, most often among subcompact cars. In 1991 its most efficient version still placed second from the bottom of 62 subcompact cars, where the Rolls-Royce Corniche/Continental rated lowest.

Averaged over 1989–1993, the best version of the 8 Series placed third from the bottom of 53 among subcompact cars rated at least three years in that span, and it was in the bottom five in one other five-year span. The name disappeared from EPA's lists after 1997 and returned in 2019, 21 model years later.

Among 26 midsize cars, 2026

The 8 Series placed 19th. The class leader was the Toyota Prius at 57 MPG. The next higher rating, 26 MPG, is shared by two nameplates.

The 8 Series, five years at a time

Average rating of its best version per span, placed in the class it sat in most often.

1989–9351st of 53subcompact cars

1994–9834th of 36subcompact cars

2019–2338th of 49midsize cars

2024–2618th of 24midsize cars

Where the engine list turned over

1994
New: 4.0-liter 8-cylinder, 5.6-liter 12-cylinder. Best rating 13 → 16 MPG.
1995
New: 5.4-liter 12-cylinder. Best rating 16 → 17 MPG.
1996
New: 4.4-liter 8-cylinder. Best rating 17 → 15 MPG.
2020
New: 3.0-liter 6-cylinder. Best rating 20 → 25 MPG.

All 15 model years, best and lowest version

Model years	Best version	Combined	City / hwy	Lowest version	Versions
2026	840i Convertible	24	21 / 29	19	9
2023–2025	840i Convertible	24	21 / 29	19	10
2022	840i Convertible	25	23 / 30	19	10
2021	840i Convertible	25	23 / 30	20	7
2020	840i Coupe	25	23 / 30	23	6
2019	M850i xDrive Convertible	20	18 / 26	20	2
1996–1997	840ci	15	14 / 19	15	2
1995	840ci	17	15 / 22	13	3
1994	840ci	16	13 / 20	13	3
1993	850ci	13	11 / 17	13	2
1991–1992	850i	13	11 / 17	13	2

Version names in the EPA list: 840ci, 840i Convertible, 840i Coupe, 840i Gran Coupe, 840i xDrive Convertible, 840i xDrive Coupe, 840i xDrive Gran Coupe, 850ci, 850csi, 850i, Alpina B8 Gran Coupe, M850i xDrive Convertible, M850i xDrive Coupe, M850i xDrive Gran Coupe.

Same class, 2026

Toyota Prius57 MPG Cadillac CT526 MPG Audi A623 MPG BMW M14 MPG