2015 head-to-head · Midsize & Large SUV
2015 BMW X5 Diesel vs Porsche Cayenne Plug-in Hybrid
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 supercharged · 8-speed dual-clutch · 47 MPGe + 22 MPG
The 2015 BMW X5 Diesel is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel, 18¢/kWh electricity and $3.95/gal premium gas, it costs about $2,056 a year to fuel (27 MPG), versus $2,389 for the 2015 Porsche Cayenne Plug-in Hybrid (47 MPGe + 22 MPG). That's roughly $334 a year, or about $1,669 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 Plug-in Hybrid
Side by side
| BMW X5 Diesel | Porsche Cayenne Plug-in Hybrid | |
|---|---|---|
| $2,056 | Your annual fuel cost | $2,389 |
| 27 MPG | Combined efficiency | 47 MPGe + 22 MPG |
| 24 MPG | City | 48 MPGe / 21 MPG |
| 31 MPG | Highway | 46 MPGe / 24 MPG |
| — | Electricity use (kWh/100 mi) | 69 kWh |
| — | Driving range | 480 mi |
| — | All-electric range | 14 mi |
| 381 g/mi | Tailpipe CO₂ (g/mi) | 260 g/mi |
| 7/10 | EPA fuel economy score | 7/10 |
| 5/10 | EPA greenhouse gas score | 8/10 |
| — | Charge time at 240V | 3 hrs |
| Diesel | Powertrain | Plug-in hybrid |
| Diesel | Fuel | Premium gas + electricity |
| 3.0L 6-cyl turbo | Engine / motor | 3.0L 6-cyl supercharged |
| 8-speed automatic | Transmission | 8-speed dual-clutch |
| 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 Plug-in Hybrid across model years
- BMW X5 Diesel
- Porsche Cayenne Plug-in Hybrid
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 Plug-in Hybrid 13th for lowest fuel cost.
The powertrains differ: the BMW X5 Diesel is a diesel, while the Porsche Cayenne Plug-in Hybrid is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2015 BMW X5 Diesel or the 2015 Porsche Cayenne Plug-in Hybrid?
Measured by cost to drive, the BMW X5 Diesel. The BMW X5 Diesel is rated 27 MPG combined and the Porsche Cayenne Plug-in Hybrid 47 MPGe + 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 BMW X5 Diesel vs. the Porsche Cayenne Plug-in Hybrid per year?
At 15,000 miles a year with $3.70/gal diesel fuel, 18¢/kWh electricity and $3.95/gal premium gas, about $2,056 for the BMW X5 Diesel and $2,389 for the Porsche Cayenne Plug-in Hybrid.
BMW X5 Diesel vs Porsche Cayenne Plug-in Hybrid in other years
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