2017 head-to-head · Large Car
2017 Audi A8 vs Cadillac XTS
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 2017 Cadillac XTS 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 $2,114 a year to fuel (22 MPG), versus $2,693 for the 2017 Audi A8 (22 MPG). That's roughly $580 a year, or about $2,898 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
- Cadillac XTS
Side by side
| Audi A8 | Cadillac XTS | |
|---|---|---|
| $2,693 | Your annual fuel cost | $2,114 |
| 22 MPG | Combined efficiency | 22 MPG |
| 19 MPG | City | 18 MPG |
| 29 MPG | Highway | 28 MPG |
| 107 cu ft | Passenger volume | 104 cu ft |
| 15 cu ft | Cargo volume | 18 cu ft |
| 397 g/mi | Tailpipe CO₂ (g/mi) | 412 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Regular gasoline |
| 3.0L 6-cyl supercharged | Engine / motor | 3.6L 6-cyl |
| 8-speed automatic | Transmission | 6-speed automatic |
| AWD | Drivetrain | FWD |
✓ 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 vs Cadillac XTS across model years
- Audi A8
- Cadillac XTS
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 XTS has more cargo space (18 vs. 15 cu ft).
Among 30 2017 large cars, the Audi A8 ranks 23rd and the Cadillac XTS 15th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2017 Audi A8 or the 2017 Cadillac XTS?
Measured by cost to drive, the Cadillac XTS. The Audi A8 is rated 22 MPG combined and the Cadillac XTS 22 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 Audi A8 vs. the Cadillac XTS per year?
At 15,000 miles a year with $3.95/gal premium gas and $3.10/gal regular gas, about $2,693 for the Audi A8 and $2,114 for the Cadillac XTS.
Which has more cargo space?
The Cadillac XTS, with 18 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
Audi A8 vs Cadillac XTS in other years
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