2015 head-to-head · Midsize & Large SUV
2015 BMW X5 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 · 27 MPG
AWD · 3.0L 6-cyl turbo · 8-speed automatic · 23 MPG
The 2015 BMW X5 Diesel is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,056 a year to fuel (27 MPG), versus $2,413 for the 2015 Porsche Cayenne Diesel (23 MPG). That's roughly $357 a year, or about $1,787 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
- BMW X5 Diesel
- Porsche Cayenne Diesel
Side by side
| BMW X5 Diesel | Porsche Cayenne Diesel | |
|---|---|---|
| $2,056 | Your annual fuel cost | $2,413 |
| 27 MPG | Combined efficiency | 23 MPG |
| 24 MPG | City | 20 MPG |
| 31 MPG | Highway | 29 MPG |
| 381 g/mi | Tailpipe CO₂ (g/mi) | 445 g/mi |
| 7/10 | EPA fuel economy score | 5/10 |
| 5/10 | 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.
BMW X5 Diesel vs Porsche Cayenne Diesel across model years
- BMW X5 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 BMW X5 Diesel ranks 6th and the Porsche Cayenne Diesel 14th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 BMW X5 Diesel or the 2015 Porsche Cayenne Diesel?
Measured by cost to drive, the BMW X5 Diesel. The BMW X5 Diesel is rated 27 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 X5 Diesel vs. the Porsche Cayenne Diesel per year?
At 15,000 miles a year with $3.70/gal diesel fuel, about $2,056 for the BMW X5 Diesel and $2,413 for the Porsche Cayenne Diesel.
BMW X5 Diesel vs Porsche Cayenne Diesel in other years
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