2026 · Subcompact Car · Gas

2026 BMW 8 Series MPG & fuel economy

The 2026 BMW 8 Series is a subcompact car offered in 3 EPA-rated configurations. The most efficient version returns 24 MPG combined (21 city / 29 highway) on premium gasoline. Across the lineup, combined ratings range from 19 to 24 MPG. Efficiency is unchanged from the 2025 model. Among 26 subcompact cars rated for 2026, it ranks 14th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $2,469 a year to fuel.

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Combined 24 MPG 21 MPG city · 29 MPG hwy

Driving range — not published for this model

Your fuel cost $2,469 15,000 mi/yr · $16.46 per 100 mi

Class rank, 2026 #14 of 26 Subcompact Cars by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Miles per year Premium gas $/gal

Fuel average

The 2026 BMW 8 Series's fuel average is 10.2 km/L (9.8 L/100 km), or 24 MPG combined: 8.9 km/L in the city and 12.3 km/L on the highway.

	MPG	km/L	L/100 km
City	21	8.9	11.2
Highway	29	12.3	8.1
Combined	24	10.2	9.8

How it ranks among 2026 Subcompact Cars

Full class ranking →

1Fiat 500e116 MPGe $788
2Honda Prelude Hybrid44 MPG $1,057
3Maserati Grancabrio EV83 MPGe $1,099
4Ford Mustang26 MPG $1,788
5MINI Cooper32 MPG $1,852
···
14BMW 8 Series24 MPG $2,469
···
26Mercedes-Benz SL-Class16 MPG $3,703

2026 8 SeriesOther subcompact carsClass median: $2,419/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

8 Series MPG across model years

Full history →

3 EPA-rated configurations

Configuration	Type	City	Hwy	Combined	Range	Your cost / yr
RWD · 3.0L 6-cyl turbo · 8-speed automatic 840i Coupe	Gas	21 MPG	29 MPG	24 MPG	—	$2,469
AWD · 3.0L 6-cyl turbo · 8-speed automatic 840i xDrive Coupe	Gas	21 MPG	29 MPG	24 MPG	—	$2,469
AWD · 4.4L 8-cyl turbo · 8-speed automatic M850i xDrive Coupe	Gas	17 MPG	24 MPG	19 MPG	—	$3,118

Specs (most efficient configuration)

Fuel: Premium gasoline
Engine / motor: 3.0L 6-cyl turbo
Transmission: 8-speed automatic
Drivetrain: RWD
Passenger volume: 81 cu ft
Cargo volume: 15 cu ft
Tailpipe CO₂: 368 g/mi
EPA fuel economy score: 5/10
EPA greenhouse gas score: 5/10

2026 BMW 8 Series vs. rivals

vs Mercedes-Benz AMG GT Hybrid 22 MPG · $2,693/yr 8 Series saves $224/yr vs Audi RS 23 MPG · $2,576/yr 8 Series saves $107/yr vs Mercedes-Benz SL-Class Hybrid 22 MPG · $2,693/yr 8 Series saves $224/yr vs Audi S3 26 MPG · $2,279/yr S3 saves $190/yr vs Mercedes-Benz CLE-Class 27 MPG · $2,194/yr CLE-Class saves $274/yr vs Audi A3 28 MPG · $2,116/yr A3 saves $353/yr vs Maserati GranTurismo 21 MPG · $2,821/yr 8 Series saves $353/yr vs Maserati Grancabrio 20 MPG · $2,962/yr 8 Series saves $494/yr vs Porsche 911 21 MPG · $2,821/yr 8 Series saves $353/yr vs Mercedes-Benz SL-Class 16 MPG · $3,703/yr 8 Series saves $1,234/yr vs Subaru BRZ 25 MPG · $2,370/yr BRZ saves $99/yr

Compare the 2026 8 Series

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Frequently asked questions

What is the gas mileage of the 2026 BMW 8 Series?

Up to 24 MPG combined (21 city / 29 highway); ratings range from 19 to 24 MPG depending on configuration.

What fuel does the 2026 BMW 8 Series use?

Premium gasoline (premium is required or recommended by the manufacturer).

What is the fuel average in km/L for the 2026 BMW 8 Series?