2015 head-to-head · Midsize & Large SUV
2015 BMW M 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 · 23 MPG
On fuel costs these two are nearly tied. Driving 15,000 miles a year with $3.95/gal premium gas and $3.70/gal diesel fuel, the most efficient 2015 BMW M (25 MPG) costs about $2,370 a year to fuel and the 2015 Porsche Cayenne Diesel (23 MPG) about $2,413.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW M
- Porsche Cayenne Diesel
Side by side
| BMW M | Porsche Cayenne Diesel | |
|---|---|---|
| $2,370 | Your annual fuel cost | $2,413 |
| 25 MPG | Combined efficiency | 23 MPG |
| 21 MPG | City | 20 MPG |
| 31 MPG | Highway | 29 MPG |
| 82 cu ft | Passenger volume | — |
| 10 cu ft | Cargo volume | — |
| 361 g/mi | Tailpipe CO₂ (g/mi) | 445 g/mi |
| 6/10 | EPA fuel economy score | 5/10 |
| 6/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Diesel |
| Premium gasoline | Fuel | Diesel |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl turbo |
| 8-speed automatic | Transmission | 8-speed automatic |
| RWD | 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.
BMW M vs Porsche Cayenne Diesel across model years
- BMW M
- 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 BMW M ranks 12th and the Porsche Cayenne Diesel 14th for lowest fuel cost.
The powertrains differ: the BMW M is a conventional gas model, while the Porsche Cayenne Diesel is a diesel.
Frequently asked questions
Which is more fuel-efficient, the 2015 BMW M or the 2015 Porsche Cayenne Diesel?
Measured by cost to drive, the BMW M. The BMW M is rated 25 MPG combined and the Porsche Cayenne Diesel 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 BMW M vs. the Porsche Cayenne Diesel per year?
At 15,000 miles a year with $3.95/gal premium gas and $3.70/gal diesel fuel, about $2,370 for the BMW M and $2,413 for the Porsche Cayenne Diesel.
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