2015 Audi S4 — Full Specifications
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The 2015 Audi S4 is a saloon/sedan powered by a 3L 6-cyl supercharged premium gasoline engine. Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 24–25 mpg (UK) across all configurations. Owners often keep a Audi S4 workshop manual to hand for servicing and repairs.
Compared with the 2014 Audi S4: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine | 3L 6-cyl supercharged |
|---|---|
| Transmission | Automatic (AM-S7) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 90 cu ft (2,549 L) |
| Luggage Volume (EPA) | 13 cu ft (368 L) |
| Fuel Economy (UK) | 25 combined / 22 urban / 34 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 28 highway mpg |
| CO₂ Emissions | 257 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,900 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2015 Audi S4, all with the 3L 6-cyl supercharged engine. Combined fuel economy ranges from 20 to 21 mpg (US), or 24 to 25 mpg (UK), depending on engine, transmission and drive. 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 |
|---|---|---|---|---|---|---|
| 3L 6-cyl supercharged | Automatic (AM-S7) | All-Wheel Drive | 25 | 21 (18/28) | 257 | $3,900 |
| 3L 6-cyl supercharged | Manual 6-spd | All-Wheel Drive | 24 | 20 (17/26) | 273 | $4,100 |
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 90 cubic feet (about 2,549 litres) and luggage volume at 13 cubic feet (about 368 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2015 Audi S4
Running Costs: 2015 Audi S4
Covering around 8,000 miles a year in a 2015 Audi S4 at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,900 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.
2015 Audi S4 Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 1 safety recall campaign that include the 2015 Audi S4 (as of 6 October 2026). Most affected areas: Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Air bags — campaign 14V667000, reported 24 October 2014. Risk: If the front air bags do not deploy in the event of a secondary impact to the front of the vehicle, there is an increased risk of occupant injury.
Owners have filed 1 complaint with NHTSA about the 2015 Audi S4. The most-reported areas are Engine (1). That is well below the median of 16 complaints across the 11 Audi S4 model years in our data.
Used-buyer checklist for the 2015 Audi S4
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Air bags (1 recall campaign) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Engine (1 owner complaint) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
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
Audi models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2015 Audi S4's 25 mpg is 2 mpg below that make average.
Of the 15 Audi S4 model years we cover, the 2015 ranks 9th for combined fuel economy on its best configuration (25 mpg UK combined, against a high of 29 mpg). See every Audi S4 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 2015 Audi S4
Frequently Asked Questions
What engine does the 2015 Audi S4 have?
It's fitted with a 3L 6-cyl supercharged premium gasoline engine, paired with a automatic (am-s7) transmission.
What is the fuel economy of the 2015 Audi S4?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 24 to 25 mpg.
How much does the 2015 Audi S4 cost to fuel per year?
The US EPA estimates about $3,900 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 2015 Audi S4 have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2015 Audi S4 have any recalls?
NHTSA lists 1 safety recall campaign that include the 2015 Audi S4 (as of 6 October 2026). Most affected areas: Air bags (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 2015 Audi S4?
Among the 1 owner complaints filed with NHTSA, the most-reported areas are Engine (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 2015 Audi S4 have?
EPA measures interior passenger volume at 90 cubic feet (about 2,549 litres) and luggage volume at 13 cubic feet (about 368 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.