2015 head-to-head · Midsize & Large SUV
2015 Audi Q7 Diesel vs Porsche Cayenne Diesel
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 · 3.0L 6-cyl turbo · 8-speed automatic · 22 MPG
AWD · 3.0L 6-cyl turbo · 8-speed automatic · 23 MPG
The 2015 Porsche Cayenne Diesel is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,413 a year to fuel (23 MPG), versus $2,523 for the 2015 Audi Q7 Diesel (22 MPG). That's roughly $110 a year, or about $548 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 Q7 Diesel
- Porsche Cayenne Diesel
Side by side
| Audi Q7 Diesel | Porsche Cayenne Diesel | |
|---|---|---|
| $2,523 | Your annual fuel cost | $2,413 |
| 22 MPG | Combined efficiency | 23 MPG |
| 19 MPG | City | 20 MPG |
| 27 MPG | Highway | 29 MPG |
| 466 g/mi | Tailpipe CO₂ (g/mi) | 445 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 4/10 | EPA greenhouse gas score | 5/10 |
| Diesel | Powertrain | Diesel |
| Diesel | Fuel | Diesel |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 8-speed automatic | Transmission | 8-speed automatic |
| AWD | Drivetrain | AWD |
✓ 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 Q7 Diesel vs Porsche Cayenne Diesel across model years
- Audi Q7 Diesel
- Porsche Cayenne Diesel
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
Among 45 2015 midsize & large SUVs, the Audi Q7 Diesel ranks 22nd and the Porsche Cayenne Diesel 14th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Audi Q7 Diesel or the 2015 Porsche Cayenne Diesel?
Measured by cost to drive, the Porsche Cayenne Diesel. The Audi Q7 Diesel is rated 22 MPG combined and the Porsche Cayenne Diesel 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Audi Q7 Diesel vs. the Porsche Cayenne Diesel per year?
At 15,000 miles a year with $3.70/gal diesel fuel, about $2,523 for the Audi Q7 Diesel and $2,413 for the Porsche Cayenne Diesel.
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