2018 head-to-head · Large Car
2018 Cadillac CT6 vs Porsche Panamera 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.
On fuel costs these two are nearly tied. Driving 15,000 miles a year with $3.10/gal regular gas, 18¢/kWh electricity and $3.95/gal premium gas, the most efficient 2018 Cadillac CT6 (21 MPG) costs about $2,214 a year to fuel and the 2018 Porsche Panamera Plug-in Hybrid (46 MPGe + 22 MPG) about $2,271.
Your numbers
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Fuel cost over 10 years
- Cadillac CT6
- Porsche Panamera Plug-in Hybrid
Side by side
| Cadillac CT6 | Porsche Panamera Plug-in Hybrid | |
|---|---|---|
| $2,214 | Your annual fuel cost | $2,271 |
| 21 MPG | Combined efficiency | 46 MPGe + 22 MPG |
| 18 MPG | City | 40 MPGe / 20 MPG |
| 27 MPG | Highway | 57 MPGe / 25 MPG |
| — | Electricity use (kWh/100 mi) | 59 kWh |
| — | Driving range | 480 mi |
| — | All-electric range | 16 mi |
| 110 cu ft | Passenger volume | 108 cu ft |
| 15 cu ft | Cargo volume | 16 cu ft |
| 416 g/mi | Tailpipe CO₂ (g/mi) | 260 g/mi |
| 4/10 | EPA fuel economy score | 6/10 |
| 4/10 | EPA greenhouse gas score | 8/10 |
| — | Charge time at 240V | 3 hrs |
| Gas | Powertrain | Plug-in hybrid |
| Regular gasoline | Fuel | Premium gas + electricity |
| 3.6L 6-cyl | Engine / motor | 2.9L 6-cyl turbo |
| 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.
Cadillac CT6 vs Porsche Panamera Plug-in Hybrid across model years
- Cadillac CT6
- Porsche Panamera 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
Per EPA interior volume figures, the Porsche Panamera Plug-in Hybrid has more cargo space (16 vs. 15 cu ft).
Among 31 2018 large cars, the Cadillac CT6 ranks 19th and the Porsche Panamera Plug-in Hybrid 20th for lowest fuel cost.
The powertrains differ: the Cadillac CT6 is a conventional gas model, while the Porsche Panamera Plug-in Hybrid is a plug-in hybrid.
Frequently asked questions
Which is more fuel-efficient, the 2018 Cadillac CT6 or the 2018 Porsche Panamera Plug-in Hybrid?
Measured by cost to drive, the Cadillac CT6. The Cadillac CT6 is rated 21 MPG combined and the Porsche Panamera Plug-in Hybrid 46 MPGe + 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2018 Cadillac CT6 vs. the Porsche Panamera Plug-in Hybrid per year?
At 15,000 miles a year with $3.10/gal regular gas, 18¢/kWh electricity and $3.95/gal premium gas, about $2,214 for the Cadillac CT6 and $2,271 for the Porsche Panamera Plug-in Hybrid.
Which has more cargo space?
The Porsche Panamera Plug-in Hybrid, with 16 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
Cadillac CT6 vs Porsche Panamera Plug-in Hybrid in other years
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