2023 Audi A8 Gas Tank Size & Fuel Capacity
Fuel tank capacity
21.7gal · 82 L
The 2023 Audi A8 has a fuel tank capacity of 21.7 gallons (82 liters).
A full tank is good for roughly 608 highway miles or 412 miles around town, going by the EPA ratings.
21.7 gal · Bigger than 73% of 2023 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2023 Audi A8 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| L 4dr Sedan AWD w/55 TFSI 3.0L 6cyl Turbo mild hybrid 8A · AWD MPG 19 / 28Range 412 / 608 mi | 3.0L 6cyl Turbo mild hybrid 8A | AWD | 21.7 gal82 L | 19 / 28 | 412 / 608 mi | |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2023 Audi A8 goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 22 MPG, a full 21.7-gallon tank covers about 477 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 21.7 | 608 | 412 |
| 3/4 | 16.3 | 456 | 309 |
| 1/2 | 10.9 | 304 | 206 |
| 1/4 | 5.4 | 152 | 103 |
| 1/8 | 2.7 | 76 | 52 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 682 gallons, roughly 31 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
What it costs to fill up a 2023 Audi A8
$114.58 to fill the 21.7-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 21.7 gal | Premium | $5.28 | $114.58 | $85.93 |
By region, 21.7-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $106.98 |
| Midwest | $5.37 | $116.53 |
| Gulf CoastLowest | $4.57 | $99.17 |
| Rocky Mountain | $5.12 | $111.10 |
| West Coast | $6.08 | $131.94 |
| CaliforniaHighest | $6.36 | $138.01 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 21.7-gallon tank$114.58
- A year of driving (15,000 mi)$3,600
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
A8 tank size in other years
The 2023 A8 uses the same 21.7 gal tank as the 2022 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2027 A8 | 21.7 gal | 586 mi |
| 2026 A8 | 21.7 gal | 586 mi |
| 2025 A8 | 21.7 gal | 564 mi |
| 2024 A8 | 21.7 gal | 608 mi |
| 2023 A8 | 21.7 gal | 608 mi |
| 2022 A8 | 21.7 gal | 608 mi |
| 2021 A8 | 17.2–21.7 gal | 564 mi |
| 2020 A8 | 17.2–21.7 gal | 564 mi |
| 2019 A8 | 21.7 gal | 586 mi |
| 2018 A8 | 21.7 gal | 629 mi |
- 2027
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000
- 1999
- 1998
- 1997
2023 Audi A8 vs similar 2023 sedans
At 21.7 gallons, the A8's largest tank ranks second of the six 2023 sedans compared here. The Mercedes-Benz S-Class carries the most (22.1 gal) and the Volvo S90 the least (15.9 gal).
| 2023 model | Tank | Longest highway range |
|---|---|---|
| Mercedes-Benz S-Class | 17.2–22.1 gal | 619 mi |
| Audi A8 | 21.7 gal | 608 mi |
| Lexus LS 500 | 21.7 gal | 629 mi |
| Genesis G90 | 19.3 gal | 502 mi |
| BMW ALPINA B8 Gran Coupe | 18.0 gal | 432 mi |
| Volvo S90 | 15.9 gal | 525 mi |
Other 2023 sedans of a similar size, one model per brand.
2023 Audi A8 fuel system recalls
None of the 2 recalls NHTSA lists for the 2023 Audi A8 involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2023 Audi A8?
The 2023 Audi A8 holds 21.7 gallons (82 liters).
How many gallons and liters does the 2023 Audi A8 gas tank hold?
The 2023 Audi A8 tank holds 82 liters, or 21.7 gallons in US gallons.
How far can a 2023 Audi A8 go on a full tank?
About 608 miles on the highway and 412 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2023 Audi A8 go on a quarter tank?
About 152 highway miles or 103 in town from the 21.7-gallon tank, which has roughly 5.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2023 Audi A8 take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2023 Audi A8?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 21.7-gallon tank from empty costs $114.58. It ranges from $99.17 in the Gulf Coast to $138.01 in California.
How much does a full tank of gas weigh in a 2023 Audi A8?
About 135 pounds for the 21.7-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2023 Audi A8 have a bigger gas tank than the Mercedes-Benz S-Class?
No. The 2023 Mercedes-Benz S-Class holds up to 22.1 gallons; the 2023 Audi A8 holds up to 21.7.
Has the 2023 Audi A8 had a fuel pump or fuel system recall?
No. None of the 2 recalls NHTSA lists for the 2023 Audi A8 involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings. Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (Audi fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.