2017 head-to-head · Large Car
2017 Cadillac XTS vs Porsche Panamera
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 2017 Cadillac XTS is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, it costs about $2,114 a year to fuel (22 MPG), versus $2,469 for the 2017 Porsche Panamera (24 MPG). That's roughly $355 a year, or about $1,776 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
- Cadillac XTS
- Porsche Panamera
Side by side
| Cadillac XTS | Porsche Panamera | |
|---|---|---|
| $2,114 | Your annual fuel cost | $2,469 |
| 22 MPG | Combined efficiency | 24 MPG |
| 18 MPG | City | 21 MPG |
| 28 MPG | Highway | 28 MPG |
| 104 cu ft | Passenger volume | 108 cu ft |
| 18 cu ft | Cargo volume | 16 cu ft |
| 412 g/mi | Tailpipe CO₂ (g/mi) | 369 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Regular gasoline | Fuel | Premium gasoline |
| 3.6L 6-cyl | Engine / motor | 3.0L 6-cyl turbo |
| 6-speed automatic | Transmission | 8-speed dual-clutch |
| FWD | Drivetrain | RWD |
✓ 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.
Cadillac XTS vs Porsche Panamera across model years
- Cadillac XTS
- Porsche Panamera
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
Per EPA interior volume figures, the Porsche Panamera has more passenger space (108 vs. 104 cu ft); the Cadillac XTS has more cargo space (18 vs. 16 cu ft).
Among 30 2017 large cars, the Cadillac XTS ranks 15th and the Porsche Panamera 22nd for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2017 Cadillac XTS or the 2017 Porsche Panamera?
Measured by cost to drive, the Cadillac XTS. The Cadillac XTS is rated 22 MPG combined and the Porsche Panamera 24 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 Cadillac XTS vs. the Porsche Panamera per year?
At 15,000 miles a year with $3.10/gal regular gas and $3.95/gal premium gas, about $2,114 for the Cadillac XTS and $2,469 for the Porsche Panamera.
Which has more cargo space?
The Cadillac XTS, with 18 cu ft of luggage volume versus 16 cu ft (EPA interior volume index).
Cadillac XTS vs Porsche Panamera in other years
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