2018 head-to-head · Midsize & Large SUV
2018 Lexus RX Hybrid 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 supercharged · 8-speed dual-clutch · 47 MPGe + 22 MPG
The 2018 Lexus RX Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, it costs about $1,975 a year to fuel (30 MPG), versus $2,402 for the 2018 Porsche Cayenne Plug-in Hybrid (47 MPGe + 22 MPG). That's roughly $427 a year, or about $2,133 over five years.
Your numbers
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Fuel cost over 10 years
- Lexus RX Hybrid
- Porsche Cayenne Plug-in Hybrid
Side by side
| Lexus RX Hybrid | Porsche Cayenne Plug-in Hybrid | |
|---|---|---|
| $1,975 | Your annual fuel cost | $2,402 |
| 30 MPG | Combined efficiency | 47 MPGe + 22 MPG |
| 31 MPG | City | 47 MPGe / 21 MPG |
| 28 MPG | Highway | 46 MPGe / 24 MPG |
| — | Electricity use (kWh/100 mi) | 70 kWh |
| — | Driving range | 490 mi |
| — | All-electric range | 14 mi |
| 297 g/mi | Tailpipe CO₂ (g/mi) | 261 g/mi |
| 7/10 | EPA fuel economy score | 6/10 |
| 7/10 | EPA greenhouse gas score | 8/10 |
| — | Charge time at 240V | 3 hrs |
| Hybrid | Powertrain | Plug-in hybrid |
| Premium gasoline | Fuel | Premium gas + electricity |
| 3.5L 6-cyl | Engine / motor | 3.0L 6-cyl supercharged |
| CVT | 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.
Lexus RX Hybrid vs Porsche Cayenne Plug-in Hybrid across model years
- Lexus RX Hybrid
- 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 42 2018 midsize & large SUVs, the Lexus RX Hybrid ranks 4th and the Porsche Cayenne Plug-in Hybrid 17th for lowest fuel cost.
The powertrains differ: the Lexus RX Hybrid is a full hybrid, while the Porsche Cayenne Plug-in Hybrid is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2018 Lexus RX Hybrid or the 2018 Porsche Cayenne Plug-in Hybrid?
Measured by cost to drive, the Lexus RX Hybrid. The Lexus RX Hybrid is rated 30 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 2018 Lexus RX Hybrid vs. the Porsche Cayenne Plug-in Hybrid per year?
At 15,000 miles a year with $3.95/gal premium gas and 18¢/kWh electricity, about $1,975 for the Lexus RX Hybrid and $2,402 for the Porsche Cayenne Plug-in Hybrid.
Lexus RX Hybrid vs Porsche Cayenne Plug-in Hybrid in other years
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