2015 head-to-head · Midsize & Large SUV
2015 Lexus GX 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.
4WD · 4.6L 8-cyl · 6-speed automatic · 17 MPG
The 2015 Porsche Cayenne is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $3,118 a year to fuel (19 MPG), versus $3,485 for the 2015 Lexus GX (17 MPG). That's roughly $367 a year, or about $1,834 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
- Lexus GX
- Porsche Cayenne
Side by side
| Lexus GX | Porsche Cayenne | |
|---|---|---|
| $3,485 | Your annual fuel cost | $3,118 |
| 17 MPG | Combined efficiency | 19 MPG |
| 15 MPG | City | 16 MPG |
| 20 MPG | Highway | 24 MPG |
| 517 g/mi | Tailpipe CO₂ (g/mi) | 461 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 |
| 4.6L 8-cyl | Engine / motor | 3.6L 6-cyl turbo |
| 6-speed automatic | Transmission | 8-speed automatic |
| 4WD | 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.
Lexus GX vs Porsche Cayenne across model years
- Lexus GX
- 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 45 2015 midsize & large SUVs, the Lexus GX ranks 41st and the Porsche Cayenne 37th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 Lexus GX or the 2015 Porsche Cayenne?
Measured by cost to drive, the Porsche Cayenne. The Lexus GX is rated 17 MPG combined and the Porsche Cayenne 19 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 Lexus GX vs. the Porsche Cayenne per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,485 for the Lexus GX and $3,118 for the Porsche Cayenne.
Lexus GX vs Porsche Cayenne in other years
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