2020 head-to-head · Large Car
2020 Audi S8 Hybrid vs Cadillac CT6
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 · 4.0L 8-cyl turbo · 8-speed automatic · 16 MPG
The 2020 Cadillac CT6 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, it costs about $2,214 a year to fuel (21 MPG), versus $3,703 for the 2020 Audi S8 Hybrid (16 MPG). That's roughly $1,489 a year, or about $7,444 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
- Audi S8 Hybrid
- Cadillac CT6
Side by side
| Audi S8 Hybrid | Cadillac CT6 | |
|---|---|---|
| $3,703 | Your annual fuel cost | $2,214 |
| 16 MPG | Combined efficiency | 21 MPG |
| 13 MPG | City | 18 MPG |
| 22 MPG | Highway | 27 MPG |
| 111 cu ft | Passenger volume | 110 cu ft |
| 13 cu ft | Cargo volume | 15 cu ft |
| 545 g/mi | Tailpipe CO₂ (g/mi) | 420 g/mi |
| 2/10 | EPA fuel economy score | 4/10 |
| 2/10 | EPA greenhouse gas score | 4/10 |
| Hybrid | Powertrain | Gas |
| Premium gasoline | Fuel | Regular gasoline |
| 4.0L 8-cyl turbo | Engine / motor | 3.6L 6-cyl |
| 8-speed automatic | Transmission | 10-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.
Audi S8 Hybrid vs Cadillac CT6 across model years
- Audi S8 Hybrid
- Cadillac CT6
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 Cadillac CT6 has more cargo space (15 vs. 13 cu ft).
Among 32 2020 large cars, the Audi S8 Hybrid ranks 30th and the Cadillac CT6 18th for lowest fuel cost.
The powertrains differ: the Audi S8 Hybrid is a full hybrid, while the Cadillac CT6 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2020 Audi S8 Hybrid or the 2020 Cadillac CT6?
Measured by cost to drive, the Cadillac CT6. The Audi S8 Hybrid is rated 16 MPG combined and the Cadillac CT6 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2020 Audi S8 Hybrid vs. the Cadillac CT6 per year?
At 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, about $3,703 for the Audi S8 Hybrid and $2,214 for the Cadillac CT6.
Which has more cargo space?
The Cadillac CT6, with 15 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
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