2015 head-to-head · Midsize Car
2015 Audi RS 7 vs Infiniti Q40
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 4.0L 8-cyl turbo · 8-speed automatic · 18 MPG
The 2015 Infiniti Q40 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,693 a year to fuel (22 MPG), versus $3,292 for the 2015 Audi RS 7 (18 MPG). That's roughly $598 a year, or about $2,992 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Audi RS 7
- Infiniti Q40
Side by side
| Audi RS 7 | Infiniti Q40 | |
|---|---|---|
| $3,292 | Your annual fuel cost | $2,693 |
| 18 MPG | Combined efficiency | 22 MPG |
| 14 MPG | City | 19 MPG |
| 25 MPG | Highway | 27 MPG |
| 94 cu ft | Passenger volume | 99 cu ft |
| 25 cu ft | Cargo volume | 14 cu ft |
| 503 g/mi | Tailpipe CO₂ (g/mi) | 412 g/mi |
| 4/10 | EPA fuel economy score | 5/10 |
| 4/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 3.7L 6-cyl |
| 8-speed automatic | Transmission | 7-speed automatic |
| AWD | 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.
Audi RS 7 vs Infiniti Q40 across model years
- Audi RS 7
- Infiniti Q40
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. 94 cu ft); the Audi RS 7 has more cargo space (25 vs. 14 cu ft).
Among 69 2015 midsize cars, the Audi RS 7 ranks 64th and the Infiniti Q40 55th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Audi RS 7 or the 2015 Infiniti Q40?
Measured by cost to drive, the Infiniti Q40. The Audi RS 7 is rated 18 MPG combined and the Infiniti Q40 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Audi RS 7 vs. the Infiniti Q40 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,292 for the Audi RS 7 and $2,693 for the Infiniti Q40.
Which has more cargo space?
The Audi RS 7, with 25 cu ft of luggage volume versus 14 cu ft (EPA interior volume index).
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