2015 head-to-head · Midsize Car
2015 Infiniti Q40 vs Mercedes-Benz E-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2015 Mercedes-Benz E-Class is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $2,693 for the 2015 Infiniti Q40 (22 MPG). That's roughly $117 a year, or about $585 over five years.
Your numbers
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Fuel cost over 10 years
- Infiniti Q40
- Mercedes-Benz E-Class
Side by side
| Infiniti Q40 | Mercedes-Benz E-Class | |
|---|---|---|
| $2,693 | Your annual fuel cost | $2,576 |
| 22 MPG | Combined efficiency | 23 MPG |
| 19 MPG | City | 20 MPG |
| 27 MPG | Highway | 28 MPG |
| 99 cu ft | Passenger volume | 80 cu ft |
| 14 cu ft | Cargo volume | 6 cu ft |
| 412 g/mi | Tailpipe CO₂ (g/mi) | 392 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.7L 6-cyl | Engine / motor | 3.5L 6-cyl |
| 7-speed automatic | Transmission | 7-speed automatic |
| RWD | Drivetrain | RWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Infiniti Q40 vs Mercedes-Benz E-Class across model years
- Infiniti Q40
- Mercedes-Benz E-Class
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Infiniti Q40 has more passenger space (99 vs. 80 cu ft); the Infiniti Q40 has more cargo space (14 vs. 6 cu ft).
Among 69 2015 midsize cars, the Infiniti Q40 ranks 55th and the Mercedes-Benz E-Class 50th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Infiniti Q40 or the 2015 Mercedes-Benz E-Class?
Measured by cost to drive, the Mercedes-Benz E-Class. The Infiniti Q40 is rated 22 MPG combined and the Mercedes-Benz E-Class 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Infiniti Q40 vs. the Mercedes-Benz E-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,693 for the Infiniti Q40 and $2,576 for the Mercedes-Benz E-Class.
Which has more cargo space?
The Infiniti Q40, with 14 cu ft of luggage volume versus 6 cu ft (EPA interior volume index).
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