2017 head-to-head · Midsize Car
2017 Acura RLX vs Audi S6
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
FWD · 3.5L 6-cyl · 6-speed automatic · 23 MPG
AWD · 4.0L 8-cyl turbo · 7-speed dual-clutch · 21 MPG
The 2017 Acura RLX is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,576 a year to fuel (23 MPG), versus $2,821 for the 2017 Audi S6 (21 MPG). That's roughly $245 a year, or about $1,227 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
- Acura RLX
- Audi S6
Side by side
| Acura RLX | Audi S6 | |
|---|---|---|
| $2,576 | Your annual fuel cost | $2,821 |
| 23 MPG | Combined efficiency | 21 MPG |
| 20 MPG | City | 18 MPG |
| 30 MPG | Highway | 27 MPG |
| 102 cu ft | Passenger volume | 98 cu ft |
| 15 cu ft | Cargo volume | 16 cu ft |
| 380 g/mi | Tailpipe CO₂ (g/mi) | 423 g/mi |
| 5/10 | EPA fuel economy score | 4/10 |
| 5/10 | EPA greenhouse gas score | 4/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 3.5L 6-cyl | Engine / motor | 4.0L 8-cyl turbo |
| 6-speed automatic | Transmission | 7-speed dual-clutch |
| FWD | 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.
Acura RLX vs Audi S6 across model years
- Acura RLX
- Audi S6
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 Acura RLX has more passenger space (102 vs. 98 cu ft); the Audi S6 has more cargo space (16 vs. 15 cu ft).
Among 67 2017 midsize cars, the Acura RLX ranks 56th and the Audi S6 57th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2017 Acura RLX or the 2017 Audi S6?
Measured by cost to drive, the Acura RLX. The Acura RLX is rated 23 MPG combined and the Audi S6 21 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2017 Acura RLX vs. the Audi S6 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,576 for the Acura RLX and $2,821 for the Audi S6.
Which has more cargo space?
The Audi S6, with 16 cu ft of luggage volume versus 15 cu ft (EPA interior volume index).
Acura RLX vs Audi S6 in other years
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