Bentley Mulsanne
12 MPG The 2020 Bentley Mulsanne is EPA-rated at 12 MPG combined (10 city / 16 highway). Over 15,000 miles a year that is about 1250 gallons, $4000 a year in fuel, or $0.267 per mile at $3.20/gal.
Across its full 2011–2020 run it averages 13.1 MPG, falling by 1 MPG over 10 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.208 | $2083 | $3125 | $4167 |
| $3.00/gal | $0.250 | $2500 | $3750 | $5000 |
| $3.20/gal | $0.267 | $2667 | $4000 | $5333 |
| $3.50/gal | $0.292 | $2917 | $4375 | $5833 |
| $4.00/gal | $0.333 | $3333 | $5000 | $6667 |
| $4.50/gal | $0.375 | $3750 | $5625 | $7500 |
| $5.00/gal | $0.417 | $4167 | $6250 | $8333 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2020 | 12 MPG | 10 | 16 | $6400 | 749 | 1 |
| 2019 | 12 MPG | 10 | 16 | $6400 | 749 | 1 |
| 2018 | 14 MPG | 11 | 18 | $5500 | 652 | 1 |
| 2017 | 14 MPG | 11 | 18 | $5500 | 652 | 1 |
| 2016 | 14 MPG | 11 | 18 | $5500 | 652 | 1 |
| 2015 | 13 MPG | 11 | 18 | $5950 | 688 | 1 |
| 2014 | 13 MPG | 11 | 18 | $5950 | 688 | 1 |
| 2013 | 13 MPG | 11 | 18 | $5950 | 688 | 1 |
| 2012 | 13 MPG | 11 | 18 | $5950 | 684 | 1 |
| 2011 | 13 MPG | 11 | 18 | $5950 | 684 | 1 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 261 midsize cars models tracked here, the Bentley Mulsanne ranks 258 on current figures, against a class average of 27.3 MPG.
Closest more-efficient alternatives in the same class: Ferrari FF (13), Bentley Continental Flying Spur (14), BMW 750il (14), Rolls-Royce Wraith (14), Dodge Diplomat (14.3).
Tailpipe CO₂ is rated at 749 grams per mile, which works out to roughly 11.2 tonnes a year at 15,000 miles.
Questions
What MPG does the Bentley Mulsanne get?
The 2020 Bentley Mulsanne is rated at 12 MPG combined by the EPA — 10 city and 16 highway. Across all 10 model years in the database it averages 13.1 MPG, ranging from 12 to 14 depending on year and trim.
How much does a Bentley Mulsanne cost in fuel per year?
At 12 MPG and 15,000 miles a year, it burns about 1250 gallons — roughly $4000 a year with fuel at $3.20 a gallon, or $0.267 per mile. The EPA's own published annual figure for the 2020 model is $6400.
Has the Bentley Mulsanne become more efficient over time?
No — it has actually gone backwards, from 13 MPG in 2011 to 12 in 2020. That usually reflects the model growing heavier, more powerful, or moving upmarket rather than the engineering getting worse.
Is the Bentley Mulsanne efficient for its class?
It ranks 258 of 261 in the Midsize Cars class on current figures, against a class average of 27.3 MPG. That is 15.3 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.