2021 Audi S7 — Full Specifications
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Running gear matters most — before anything else, UK: check tyre prices at TirendoUS: check wheel & tyre prices at WheelHero for this car's fitment.
The 2021 Audi S7 is a hatchback powered by a 2.9L 6-cyl turbo premium gasoline engine. It returns around 26 mpg (UK) / 22 mpg (US EPA) combined. Owners often keep a Audi S7 workshop manual to hand for servicing and repairs.
Compared with the 2020 Audi S7: 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 turbo |
|---|---|
| Transmission | Automatic (S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Hybrid |
| Drive | All-Wheel Drive |
| Body Style | Hatchback |
| Passenger Volume (EPA) | 94 cu ft (2,662 L) |
| Luggage Volume (EPA) | 25 cu ft (708 L) |
| Fuel Economy (UK) | 26 combined / 22 urban / 34 extra-urban mpg |
| Fuel Economy (US EPA) | 22 combined / 18 city / 28 highway mpg |
| CO₂ Emissions | 255 g/km |
| EPA Greenhouse Gas Score | 4 / 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 2021 Audi S7, all with the 2.9L 6-cyl turbo 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 turbo (Hybrid) | Automatic (S8) | All-Wheel Drive | 26 | 22 (18/28) | 255 | $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 94 cubic feet (about 2,662 litres) and luggage volume at 25 cubic feet (about 708 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2021 Audi S7
Running Costs: 2021 Audi S7
Covering around 8,000 miles a year in a 2021 Audi S7 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.
2021 Audi S7 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 10 safety recall campaigns that include the 2021 Audi S7 (as of 6 October 2026). Most affected areas: Electrical system (3), Back over prevention (2), Service brakes (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Back over prevention — campaign 25V900000, reported 19 December 2025. Risk: A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.
- Electrical system — campaign 25V201000, reported 31 March 2025. Risk: An instrument panel display that fails to show critical safety information, such as the speedometer or warning lights, increases the risk of a crash.
- Service brakes — campaign 23V601000, reported 25 August 2023. Risk: Incorrect brake fluid can reduce braking ability and increase the risk of a crash.
- Electrical system — campaign 22V861000, reported 21 November 2022. Risk: A gateway control module shutdown will suddenly reduce engine power, increasing the risk of a crash.
Showing the 4 most recent of 10 campaigns.
Owners have filed 3 complaints with NHTSA about the 2021 Audi S7. The most-reported areas are Electrical system (3), Forward collision avoidance (1), Power train (1).
Used-buyer checklist for the 2021 Audi S7
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Electrical system (3 recall campaigns · 3 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Brakes (1 recall campaign) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Tyres (1 recall campaign) — Check tyre age and wear and ask about any tyre recalls.
- Driver-assist sensors (1 owner complaint) — Check that driver-assist warning lights are off and sensors are clean and undamaged.
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 12 Audi S7 model years we cover, the 2021 is the most economical on its best configuration (26 mpg UK combined). See every Audi S7 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 2021 Audi S7
Frequently Asked Questions
What engine does the 2021 Audi S7 have?
It's fitted with a 2.9L 6-cyl turbo premium gasoline engine, paired with a automatic (s8) transmission.
What is the fuel economy of the 2021 Audi S7?
The most efficient configuration returns around 26 mpg (UK) combined, or 22 mpg on the US EPA cycle.
How much does the 2021 Audi S7 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 2021 Audi S7 have any recalls?
NHTSA lists 10 safety recall campaigns that include the 2021 Audi S7 (as of 6 October 2026). Most affected areas: Electrical system (3), Back over prevention (2), Service brakes (1). 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 2021 Audi S7?
Among the 3 owner complaints filed with NHTSA, the most-reported areas are Electrical system (3 complaints), Forward collision avoidance (1 complaint), Power train (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 2021 Audi S7 have?
EPA measures interior passenger volume at 94 cubic feet (about 2,662 litres) and luggage volume at 25 cubic feet (about 708 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.