2025 Audi S6 — Full Specifications
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The 2025 Audi S6 is a saloon/sedan powered by a 2.9L 6-cyl premium gasoline engine. It returns around 26 mpg (UK) / 22 mpg (US EPA) combined. Owners often keep a Audi S6 workshop manual to hand for servicing and repairs.
Compared with the 2024 Audi S6: Fuel economy is essentially unchanged at around 26 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 2.9L 6-cyl |
|---|---|
| Transmission | Automatic (S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Hybrid |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 99 cu ft (2,803 L) |
| Luggage Volume (EPA) | 14 cu ft (396 L) |
| Fuel Economy (UK) | 26 combined / 23 urban / 32 extra-urban mpg |
| Fuel Economy (US EPA) | 22 combined / 19 city / 27 highway mpg |
| CO₂ Emissions | 254 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,750 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 1 configuration for the 2025 Audi S6, all with the 2.9L 6-cyl engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2.9L 6-cyl (Hybrid) | Automatic (S8) | All-Wheel Drive | 26 | 22 (19/27) | 254 | $3,750 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 99 cubic feet (about 2,803 litres) and luggage volume at 14 cubic feet (about 396 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2025 Audi S6
Running Costs: 2025 Audi S6
Covering around 8,000 miles a year in a 2025 Audi S6 at 26 mpg combined, expect roughly 1,399 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,750 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2025 Audi S6 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 2 safety recall campaigns that include the 2025 Audi S6 (as of 6 October 2026). Most affected areas: Seat belts (2). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Seat belts — campaign 25V899000, reported 19 December 2025. Risk: An improperly secured child seat can increase risk of injury during a crash.
- Seat belts — campaign 25V638000, reported 24 September 2025. Risk: In a crash, a damaged torsion bar in a retractor could fail. If this happens, the seat belt may not properly restrain an occupant during a crash, increasing the risk of injury.
Owners have filed 4 complaints with NHTSA about the 2025 Audi S6. The most-reported areas are Electrical system (3), Fuel/propulsion system (1), Structure (1).
Used-buyer checklist for the 2025 Audi S6
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Seat belts (2 recall campaigns) — Check every belt latches and retracts properly and that any restraint recalls were completed.
- Electrical system (3 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Fuel system (1 owner complaint) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Body structure (1 owner complaint) — Inspect for corrosion and for subframe or body-panel damage, especially underneath.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
At 26 mpg (UK) combined it sits close to the 27 mpg average for Audi models in our database.
Of the 14 Audi S6 model years we cover, the 2025 is the most economical on its best configuration (26 mpg UK combined). See every Audi S6 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2025 Audi S6
Frequently Asked Questions
What engine does the 2025 Audi S6 have?
It's fitted with a 2.9L 6-cyl premium gasoline engine, paired with a automatic (s8) transmission.
What is the fuel economy of the 2025 Audi S6?
The most efficient configuration returns around 26 mpg (UK) combined, or 22 mpg on the US EPA cycle.
How much does the 2025 Audi S6 cost to fuel per year?
The US EPA estimates about $3,750 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2025 Audi S6 have any recalls?
NHTSA lists 2 safety recall campaigns that include the 2025 Audi S6 (as of 6 October 2026). Most affected areas: Seat belts (2). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2025 Audi S6?
Among the 4 owner complaints filed with NHTSA, the most-reported areas are Electrical system (3 complaints), Fuel/propulsion system (1 complaint), Structure (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2025 Audi S6 have?
EPA measures interior passenger volume at 99 cubic feet (about 2,803 litres) and luggage volume at 14 cubic feet (about 396 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.