Against 416 other V6 cars rated 2017–2019, the 640i beats their 21.7 mpg average by 1.3 mpg, about $100 a year.
Every BMW 640i engine, compared
The BMW 640i was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3L 6-cyl | 21.3 / 30.6 | 2012–2019 | $1,567 |
What that actually costs
Against its rivals in the same model years, the Honda Civic gets 36 mpg, the Audi A3 29.3 mpg and the Lexus RC 22.2 mpg, next to 23 mpg for the 2019 640i.
| Measure | Value |
|---|---|
| Cost per mile (2019) | $0.139 |
| Fuel per year | $1,670 |
| Fuel over five years | $8,350 |
| Against other V6 cars, 2017–2019 | −$100 a year |
| EPA's own estimate | $3,150 a year |
City or highway — who is this car for
The 2019 BMW 640i gives up 9 mpg in town: 29 on the highway against 20 in the city, $596 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2019) | 20 mpg | $1,920 a year if you only drive in town |
| Highway | 29 mpg | $1,324 a year if you mostly commute |
| Gap | +9 mpg (45%) | Wide — this car dislikes traffic |
How the 640i changed over the years
The 640i peaked in 2013 at 26 mpg (23 city, 32 highway) and was at its thirstiest in 2019 at 23 — 3 mpg apart, or $193 a year in fuel between buying one year and the other. The 2019 car does 23.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2019 | 20 / 29 | 1 | $1,670 | |
| 2018 | 20 / 29 | 1 | $1,670 | |
| 2017 | 21 / 30 | 1 | $1,600 | |
| 2016 | 20 / 30 | 1 | $1,600 | |
| 2015 | 21 / 31 | 1 | $1,536 | |
| 2014 | 22 / 32 | 1 | $1,536 | |
| 2013 | 23 / 32 | 1 | $1,477 | |
| 2012 | 23 / 32 | 1 | $1,477 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 8 EPA ratings of the BMW 640i — 1 engine across 2012–2019. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,150. Full method.
Frequently asked questions
What mpg does the 2019 BMW 640i get?
23 mpg combined, 20 city and 29 highway, per EPA. Across every year since 2012 the 640i has averaged 24.5 mpg.
Is the 2019 640i more efficient than the 2018?
About the same: 23 against 23 mpg combined.
Which 640i year has the best gas mileage?
The 2013, at 26 mpg combined (23 city, 32 highway).
Does the 640i get better gas mileage than the Honda Civic?
No: 23 mpg for the 2019 640i against 36 for the 2020 Honda Civic, about $603 a year more to run.
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