2025 Audi S6 Specs: MPG, Gas Mileage, Engine Size & Dimensions
2025 Audi S6 Specs at a Glance
The 2025 Audi S6 gets 22 mpg combined on the 2.9L All-Wheel Drive configuration, weighs 4,495 lbs, measures 194.9 in long. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.
- Combined MPG
- 22 mpg (19 city / 27 hwy)
- Best configuration: 2.9L · All-Wheel Drive · Automatic (S8)
- Engine
- 2.9L 6-cyl
- 2.9L · All-Wheel Drive · Automatic (S8)
- Curb weight
- 4,495 lbs
- Heaviest recorded configuration: S6 4DR SEDAN
- Length
- 194.9 in · 74.4 in wide · 57.1 in tall
- Wheelbase
- 115.4 in
2025 Audi S6 trims and MPG
| Trim | Engine | Trans | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 19 | 27 | 22 |
Detailed Specifications
MPG & Fuel Economy
MPG for every year and trim
View details →Engine Specifications
Engine Specs for every year and trim
View details →Annual Fuel Cost
Fuel Cost for every year and trim
View details →Transmission Specifications
Transmission for every year and trim
View details →Drivetrain & Drive Type
Drivetrain for every year and trim
View details →Vehicle Class & EPA Size Category
Vehicle Class for every year and trim
View details →Maintenance Schedule & Service Intervals
Maintenance for every year and trim
View details →Dimensions & Size
Dimensions for every year and trim
View details →Curb Weight
Curb Weight for every year and trim
View details →Audi S6 Generations
Grouped by year ranges where the engine lineup, drivetrain options, and EPA class stay consistent — a derived approximation of the factory generations, not a manufacturer-published list.
| Years | Variants | Engines | Drive | Class | Best MPG |
|---|---|---|---|---|---|
| 2020–2025 | 6 | 2.9L | 4-Wheel Drive, All-Wheel Drive | Midsize Cars | 22 |
| 2015–2018 | 4 | 4.0L | All-Wheel Drive | Midsize Cars | 21 |
Audi S6 — All Years Overview
| Year | Trim | Engine | Trans | Drive | City | Hwy | Combined | Fuel |
|---|---|---|---|---|---|---|---|---|
| 2025 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 19 | 27 | 22 | Premium Gasoline |
| 2024 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 19 | 26 | 22 | Premium Gasoline |
| 2023 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 19 | 26 | 22 | Premium Gasoline |
| 2022 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | 4-Wheel Drive | 18 | 28 | 22 | Premium Gasoline |
| 2021 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 18 | 28 | 22 | Premium Gasoline |
| 2020 | Auto (S8), 6 cyl, 2.9 L | 6 · 2.9L | Automatic (S8) | All-Wheel Drive | 18 | 28 | 22 | Premium Gasoline |
| 2018 | Auto (AM-S7), 8 cyl, 4.0 L | 8 · 4.0L | Automatic (AM-S7) | All-Wheel Drive | 16 | 24 | 18 | Premium Gasoline |
| 2017 | Auto (AM-S7), 8 cyl, 4.0 L | 8 · 4.0L | Automatic (AM-S7) | All-Wheel Drive | 18 | 27 | 21 | Premium Gasoline |
| 2016 | Auto (AM-S7), 8 cyl, 4.0 L | 8 · 4.0L | Automatic (AM-S7) | All-Wheel Drive | 18 | 27 | 21 | Premium Gasoline |
| 2015 | Auto (AM-S7), 8 cyl, 4.0 L | 8 · 4.0L | Automatic (AM-S7) | All-Wheel Drive | 17 | 27 | 20 | Premium Gasoline |
Compare the Audi S6 with rivals
- Audi S6 vs BMW 4 Series
- Audi S6 vs Mercedes-Benz E-Class
- Audi S6 vs Ford Mustang
- Audi S6 vs Mercedes-Benz C-Class
- Audi S6 vs Mercedes-Benz S-Class
- Audi S6 vs Mazda 3
- Audi S6 vs Dodge Challenger
- Audi S6 vs BMW 2 Series
- Audi S6 vs BMW 5 Series
- Audi S6 vs Chevrolet Camaro
- Audi S6 vs BMW 7 Series
- Audi S6 vs BMW 8 Series
- Audi S6 vs Infiniti Q50
- Audi S6 vs Kia Forte
- Audi S6 vs MINI John Cooper Works
- Audi S6 vs Lexus IS
- Audi S6 vs Cadillac CT4
- Audi S6 vs Cadillac CT5
- Audi S6 vs Volvo S60
- Audi S6 vs Lexus RC
- Audi S6 vs Lexus LS
- Audi S6 vs Nissan Altima
- Audi S6 vs Jaguar XF
- Audi S6 vs MINI Clubman
- Audi S6 vs Chrysler 300
- Audi S6 vs Nissan Sentra
- Audi S6 vs Genesis G70
- Audi S6 vs Rolls-Royce Ghost
- Audi S6 vs Maserati Ghibli
- Audi S6 vs Fiat 500
- Audi S6 vs Bentley Continental
- Audi S6 vs Genesis G90
- Audi S6 vs Maserati Quattroporte
- Audi S6 vs Subaru WRX
- Audi S6 vs Rolls-Royce Phantom
- Audi S6 vs Mercedes-Benz CLS-Class
- Audi S6 vs Nissan Versa
- Audi S6 vs Kia K5
- Audi S6 vs Subaru BRZ
- Audi S6 vs Kia Stinger
Compare across every brand
All Audi S6 specifications
Audi S6 — Frequently Asked Questions
What is the fuel economy of the 2025 Audi S6?
The Audi S6 is EPA-rated at up to 22 MPG combined (19 city / 27 highway).
What engine does the 2025 Audi S6 have?
The Audi S6 uses a 2.9L 6-cylinder engine paired with an Automatic transmission.
What years of the Audi S6 are covered here?
This page documents 10 verified Audi S6 configurations across model years 2015–2025.
Which model year of the Audi S6 is the most fuel efficient?
The 2025 Audi S6 holds the highest combined rating at 22 MPG; the 2018 sits lowest at 18 MPG, a difference of 4 MPG (about 22%) across the 10 rated years on file.
How many engine options does the Audi S6 have?
The records list 2 distinct displacements for the Audi S6 — 2.9L, 4L — which is why combined MPG varies between trims of the same year.
Is the 2025 Audi S6 front-wheel drive or all-wheel drive?
The Audi S6 appears in 2 drivetrain layouts across the years documented here — All-Wheel Drive, 4-Wheel Drive — with the latest 2025 record on All-Wheel Drive.