2018 head-to-head · Large Car
2018 Cadillac CT6 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 2018 Cadillac CT6 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 $2,214 a year to fuel (21 MPG), versus $2,469 for the 2018 Porsche Panamera (24 MPG). That's roughly $254 a year, or about $1,272 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 CT6
- Porsche Panamera
Side by side
| Cadillac CT6 | Porsche Panamera | |
|---|---|---|
| $2,214 | Your annual fuel cost | $2,469 |
| 21 MPG | Combined efficiency | 24 MPG |
| 18 MPG | City | 21 MPG |
| 27 MPG | Highway | 28 MPG |
| 110 cu ft | Passenger volume | 108 cu ft |
| 15 cu ft | Cargo volume | 16 cu ft |
| 416 g/mi | Tailpipe CO₂ (g/mi) | 369 g/mi |
| 4/10 | EPA fuel economy score | 5/10 |
| 4/10 | 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 |
| 8-speed automatic | Transmission | 8-speed dual-clutch |
| AWD | 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 CT6 vs Porsche Panamera across model years
- Cadillac CT6
- 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 cargo space (16 vs. 15 cu ft).
Among 31 2018 large cars, the Cadillac CT6 ranks 19th and the Porsche Panamera 24th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2018 Cadillac CT6 or the 2018 Porsche Panamera?
Measured by cost to drive, the Cadillac CT6. The Cadillac CT6 is rated 21 MPG combined and the Porsche Panamera 24 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Cadillac CT6 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 $2,214 for the Cadillac CT6 and $2,469 for the Porsche Panamera.
Which has more cargo space?
The Porsche Panamera, with 16 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
Cadillac CT6 vs Porsche Panamera in other years
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