2014 Audi A8 L — Full Specifications
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The 2014 Audi A8 L is a saloon/sedan offered with 4 engines (3L 6-cyl supercharged, 3L 6-cyl turbo, 4L 8-cyl turbo). Its most fuel-efficient configuration returns around 34 mpg (UK) / 28 mpg (US EPA) combined, with 18–34 mpg (UK) across all configurations. Owners often keep a Audi A8 L workshop manual to hand for servicing and repairs.
Compared with the 2013 Audi A8 L: Fuel economy improves from 25 to 34 mpg (UK) combined on the most efficient configuration. EPA lists new engine options for 2014: 3L 6-cyl turbo.
Full Specifications
| Engine (most efficient) | 3L 6-cyl turbo |
|---|---|
| Engine options | 3L 6-cyl supercharged · 3L 6-cyl turbo · 4L 8-cyl turbo · 6.3L 12-cyl |
| Transmission (most efficient) | Automatic (S8) |
| Fuel Type | Diesel |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 107 cu ft (3,030 L) |
| Luggage Volume (EPA) | 15 cu ft (425 L) |
| Fuel Economy (UK) | 34 combined / 29 urban / 43 extra-urban mpg |
| Fuel Economy (US EPA) | 28 combined / 24 city / 36 highway mpg |
| CO₂ Emissions | 224 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,400 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 4 configurations for the 2014 Audi A8 L across 4 engines (3L 6-cyl supercharged, 3L 6-cyl turbo, 4L 8-cyl turbo, 6.3L 12-cyl). Combined fuel economy ranges from 15 to 28 mpg (US), or 18 to 34 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 (S8) | All-Wheel Drive | 25 | 21 (18/28) | 261 | $3,900 |
| 3L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 34 | 28 (24/36) | 224 | $3,400 |
| 4L 8-cyl turbo | Automatic (S8) | All-Wheel Drive | 23 | 19 (16/26) | 286 | $4,350 |
| 6.3L 12-cyl | Automatic (S8) | All-Wheel Drive | 18 | 15 (13/20) | 364 | $5,500 |
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 107 cubic feet (about 3,030 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2014 Audi A8 L
Running Costs: 2014 Audi A8 L
Covering around 8,000 miles a year in a 2014 Audi A8 L at 34 mpg combined, expect roughly 1,070 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,400 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.
2014 Audi A8 L 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 5 safety recall campaigns that include the 2014 Audi A8 L (as of 6 October 2026). Most affected areas: Fuel system (2), Engine and engine cooling (1), Structure (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Engine and engine cooling — campaign 22V178000, reported 23 March 2022. Risk: Worn bearings can cause the turbine wheel to contact the turbocharger housing or cause the shaft to break, causing an engine stall and increasing the risk of a crash.
- Structure — campaign 20V397000, reported 7 July 2020. Risk: If the seal contacts hot engine components, there could be an increased risk of a fire.
- Fuel system — campaign 19V057000, reported 28 January 2019. Risk: Leaking fuel, in the presence of an ignition source, increases the risk of fire.
- Fuel system — campaign 18V430000, reported 25 June 2018. Risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Showing the 4 most recent of 5 campaigns.
Owners have filed 18 complaints with NHTSA about the 2014 Audi A8 L. The most-reported areas are Engine (12), Fuel/propulsion system (3), Forward collision avoidance (2). That is close to the median of 13 complaints across the 8 Audi A8 L model years in our data.
Used-buyer checklist for the 2014 Audi A8 L
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Fuel system (2 recall campaigns · 3 owner complaints) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Engine (12 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
- Engine cooling (1 recall campaign) — Check coolant level, look for leaks and make sure the temperature stays steady in traffic.
- Body structure (1 recall campaign) — 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
Audi models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2014 Audi A8 L's 34 mpg is 7 mpg above that make average. Its 224 g/km CO₂ figure is 27 g/km lower than the 251 g/km Audi average.
Of the 13 Audi A8 L model years we cover, the 2014 is the most economical on its best configuration (34 mpg UK combined). See every Audi A8 L 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 2014 Audi A8 L
Frequently Asked Questions
What engine does the 2014 Audi A8 L have?
EPA lists 4 engines for the 2014 Audi A8 L: 3L 6-cyl supercharged, 3L 6-cyl turbo, 4L 8-cyl turbo, 6.3L 12-cyl. The most fuel-efficient configuration pairs the 3L 6-cyl turbo with a automatic (s8).
What is the fuel economy of the 2014 Audi A8 L?
The most efficient configuration returns around 34 mpg (UK) combined, or 28 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 18 to 34 mpg.
How much does the 2014 Audi A8 L cost to fuel per year?
The US EPA estimates about $3,400 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 2014 Audi A8 L have any recalls?
NHTSA lists 5 safety recall campaigns that include the 2014 Audi A8 L (as of 6 October 2026). Most affected areas: Fuel system (2), Engine and engine cooling (1), Structure (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 2014 Audi A8 L?
Among the 18 owner complaints filed with NHTSA, the most-reported areas are Engine (12 complaints), Fuel/propulsion system (3 complaints), Forward collision avoidance (2 complaints). 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 2014 Audi A8 L have?
EPA measures interior passenger volume at 107 cubic feet (about 3,030 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.