2020 head-to-head · Large Car
2020 Cadillac CT6 vs Porsche Taycan
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 2020 Porsche Taycan is the cheaper one to run. Driving 15,000 miles a year with $3.10/gal regular gas and 18¢/kWh electricity, it costs about $1,315 a year to fuel (69 MPGe), versus $2,214 for the 2020 Cadillac CT6 (21 MPG). That's roughly $899 a year, or about $4,497 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 Taycan
Side by side
| Cadillac CT6 | Porsche Taycan | |
|---|---|---|
| $2,214 | Your annual fuel cost | $1,315 |
| 21 MPG | Combined efficiency | 69 MPGe |
| 18 MPG | City | 68 MPGe |
| 27 MPG | Highway | 71 MPGe |
| — | Electricity use (kWh/100 mi) | 48.7 kWh |
| — | Driving range | 201 mi |
| 110 cu ft | Passenger volume | 108 cu ft |
| 15 cu ft | Cargo volume | 16 cu ft |
| 420 g/mi | Tailpipe CO₂ (g/mi) | 0 g/mi |
| 4/10 | EPA fuel economy score | 10/10 |
| 4/10 | EPA greenhouse gas score | 10/10 |
| — | Charge time at 240V | 10 hrs |
| Gas | Powertrain | Electric |
| Regular gasoline | Fuel | Electricity |
| 3.6L 6-cyl | Engine / motor | Electric motor (170 kW) |
| 10-speed automatic | Transmission | 2-speed automatic |
| 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 Taycan across model years
- Cadillac CT6
- Porsche Taycan
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 Taycan has more cargo space (16 vs. 15 cu ft).
Among 32 2020 large cars, the Cadillac CT6 ranks 18th and the Porsche Taycan 5th for lowest fuel cost.
Because the Porsche Taycan is fully electric, it has no tailpipe emissions and its running cost depends almost entirely on your electricity rate. Cheap overnight home charging widens its advantage over the Cadillac CT6; relying on DC fast chargers can erase it.
Frequently asked questions
Which is more fuel-efficient, the 2020 Cadillac CT6 or the 2020 Porsche Taycan?
Measured by cost to drive, the Porsche Taycan. The Cadillac CT6 is rated 21 MPG combined and the Porsche Taycan 69 MPGe (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 Cadillac CT6 vs. the Porsche Taycan per year?
At 15,000 miles a year with $3.10/gal regular gas and 18¢/kWh electricity, about $2,214 for the Cadillac CT6 and $1,315 for the Porsche Taycan.
Which has more cargo space?
The Porsche Taycan, with 16 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
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