2016 head-to-head · Large Car
2016 Audi A8 Diesel 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 · 3.0L 6-cyl turbo · 8-speed automatic · 28 MPG
The 2016 Cadillac CT6 is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel and $3.10/gal regular gas, it costs about $1,860 a year to fuel (25 MPG), versus $1,982 for the 2016 Audi A8 Diesel (28 MPG). That's roughly $122 a year, or about $611 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 A8 Diesel
- Cadillac CT6
Side by side
| Audi A8 Diesel | Cadillac CT6 | |
|---|---|---|
| $1,982 | Your annual fuel cost | $1,860 |
| 28 MPG | Combined efficiency | 25 MPG |
| 24 MPG | City | 22 MPG |
| 36 MPG | Highway | 30 MPG |
| 107 cu ft | Passenger volume | 110 cu ft |
| 15 cu ft | Cargo volume | 15 cu ft |
| 360 g/mi | Tailpipe CO₂ (g/mi) | 357 g/mi |
| 7/10 | EPA fuel economy score | 6/10 |
| 6/10 | EPA greenhouse gas score | 6/10 |
| Diesel | Powertrain | Gas |
| Diesel | Fuel | Regular gasoline |
| 3.0L 6-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 8-speed automatic | Transmission | 8-speed automatic |
| 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.
Audi A8 Diesel vs Cadillac CT6 across model years
- Audi A8 Diesel
- 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
Among 30 2016 large cars, the Audi A8 Diesel ranks 8th and the Cadillac CT6 6th for lowest fuel cost.
The powertrains differ: the Audi A8 Diesel is a diesel, while the Cadillac CT6 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2016 Audi A8 Diesel or the 2016 Cadillac CT6?
Measured by cost to drive, the Cadillac CT6. The Audi A8 Diesel is rated 28 MPG combined and the Cadillac CT6 25 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2016 Audi A8 Diesel vs. the Cadillac CT6 per year?
At 15,000 miles a year with $3.70/gal diesel fuel and $3.10/gal regular gas, about $1,982 for the Audi A8 Diesel and $1,860 for the Cadillac CT6.
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