2018 head-to-head · Midsize & Large SUV
2018 BMW X5 vs Porsche Cayenne
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 2018 BMW X5 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,821 a year to fuel (21 MPG), versus $2,962 for the 2018 Porsche Cayenne (20 MPG). That's roughly $141 a year, or about $705 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
- Porsche Cayenne
Side by side
| BMW X5 | Porsche Cayenne | |
|---|---|---|
| $2,821 | Your annual fuel cost | $2,962 |
| 21 MPG | Combined efficiency | 20 MPG |
| 18 MPG | City | 17 MPG |
| 25 MPG | Highway | 24 MPG |
| 426 g/mi | Tailpipe CO₂ (g/mi) | 452 g/mi |
| 4/10 | EPA fuel economy score | 4/10 |
| 4/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 3.6L 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 X5 vs Porsche Cayenne across model years
- BMW X5
- Porsche Cayenne
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 42 2018 midsize & large SUVs, the BMW X5 ranks 27th and the Porsche Cayenne 31st for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 BMW X5 or the 2018 Porsche Cayenne?
Measured by cost to drive, the BMW X5. The BMW X5 is rated 21 MPG combined and the Porsche Cayenne 20 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 BMW X5 vs. the Porsche Cayenne per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,821 for the BMW X5 and $2,962 for the Porsche Cayenne.
BMW X5 vs Porsche Cayenne in other years
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