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Bentley Mulsanne Fuel Economy (MPG)

What is the real-world gas mileage of a 2020 Bentley Mulsanne?

The 2020 Bentley Mulsanne gets up to 14 MPG combined (11 city / 18 highway) in EPA testing.

Latest model year (2020):

The Bentley Mulsanne gets up to 12 MPG combined (10 city / 16 highway) in the Auto (S8), 8 cyl, 6.8 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026
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Bentley Mulsanne MPG — All Years

YearTrimEngineFuelCity (MPG)Hwy (MPG)Combined (MPG)
2020Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline101612
2019Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline101612
2018Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline111814
2017Config 1 of 2Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline111814
2017Config 2 of 2Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline111713
2016Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline111814
2015Auto (S8), 8 cyl, 6.8 L8 6.8LPremium Gasoline111813

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Bentley Mulsanne data analysis

How Bentley Mulsanne combined fuel economy varies

Across 7 configurations recorded for the 2015 through 2020 Bentley Mulsanne, combined fuel economy runs from 12 MPG to 14 MPG. The strongest figure belongs to the 2016 Bentley Mulsanne (Auto (S8), 8 cyl, 6.8 L) at 14 MPG, and the weakest to the 2020 car (Auto (S8), 8 cyl, 6.8 L) at 12 MPG — a spread of 17%. The narrow spread means any year of the Bentley Mulsanne in this table behaves much like the others, so you can shop on price, condition and mileage rather than chasing a particular model year.

What changed for 2020

Average combined fuel economy for the 2020 Bentley Mulsanne is 12 MPG, against 12 MPG for the 2019 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Bentley Mulsanne data

This page lists every 2015 through 2020 Bentley Mulsanne record we hold for this measurement — 7 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Where these Bentley Mulsanne figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Bentley Mulsanne record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speedEPA highway specAutoSpecData adjusted MPGFuel you lose
60 mph18 MPG18 MPG0%
65 mph18 MPG16.8 MPG7%
70 mph18 MPG15.6 MPG13%
75 mph18 MPG14.6 MPG19%
80 mph18 MPG13.6 MPG25%

Our Real-World Speed MPG Adjuster re-scales the Bentley Mulsanne EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About Mulsanne MPG

What is the MPG of the Bentley Mulsanne?

The Bentley Mulsanne gets up to 14 MPG combined (11 city / 18 highway) in the 2020 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Bentley Mulsanne trim has the best fuel economy?

The Auto (S8), 8 cyl, 6.8 L trim offers the best combined fuel economy at 14 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.

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