Audi S6 Engine Specifications
The 2025 Audi S6 is offered with 2.9L–4.0L engines in 6 and 8-cylinder form, per EPA fuel-economy records.
Latest model year (2025):
The Audi S6 is available with 6 2.9L and Automatic (S8) (All-Wheel Drive).
Audi S6 Engine Specs — All Years
| Year | Trim | Cylinders | Displ. | Transmission | Drive | Fuel Type | Vehicle Class |
|---|---|---|---|---|---|---|---|
| 2025 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2024 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2023 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2022 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | 4-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2021 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2020 | Auto (S8), 6 cyl, 2.9 L | 6 | 2.9L | Automatic (S8) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2018 | Auto (AM-S7), 8 cyl, 4.0 L | 8 | 4.0L | Automatic (AM-S7) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2017 | Auto (AM-S7), 8 cyl, 4.0 L | 8 | 4.0L | Automatic (AM-S7) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2016 | Auto (AM-S7), 8 cyl, 4.0 L | 8 | 4.0L | Automatic (AM-S7) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
| 2015 | Auto (AM-S7), 8 cyl, 4.0 L | 8 | 4.0L | Automatic (AM-S7) | All-Wheel Drive | Premium Gasoline | Midsize Cars |
Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.
Audi S6 data analysis
How Audi S6 engine displacement varies
Across 10 configurations recorded for the 2015 through 2025 Audi S6, engine displacement runs from 2.9 litres to 4 litres. The strongest figure belongs to the 2025 Audi S6 (SIDI; Mild Hybrid) at 2.9 litres, and the weakest to the 2015 car (SIDI) at 4 litres — a spread of 28%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Audi S6 would be misleading.
What changed for 2025
Average engine displacement for the 2025 Audi S6 is 2.9 litres, against 2.9 litres for the 2024 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.
How to read this Audi S6 data
This page lists every 2015 through 2025 Audi S6 record we hold for this measurement — 10 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.
Configurations behind these Audi S6 numbers
The 2015 through 2025 Audi S6 entries here cover the variants SIDI; Mild Hybrid and SIDI. 2025 is the busiest model year in the record with 1 separate measured configuration, which is why a single quoted engine displacement figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.
Where these Audi S6 figures come from
Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Audi S6 record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.
Frequently Asked Questions About S6 Engine Specs
What engine does the Audi S6 have?
The Audi S6 is available with 6 cylinder engines ranging up to 2.9L. Transmission and drivetrain options vary by trim. See the full table above.
Is the Audi S6 available with all-wheel drive?
Yes, the Audi S6 is available with all-wheel drive. Check the "Drive" column in the table above for specific trims.
Engine Specs for other Audi models
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