2003 Audi A8 Gas Tank Size & Fuel Capacity
Fuel tank capacity
23.7–24.2gal · 90–92 L
The 2003 Audi A8 has a fuel tank capacity of 23.7 to 24.2 gallons (90–92 liters), depending on the trim. The most common size is 24.2 gallons, used on 1 trim.
A full tank is good for roughly 545–557 highway miles or 356–363 miles around town, going by the EPA ratings.
24.2 gal · Bigger than 74% of 2003 models we list.
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2003 Audi A8 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| quattro AWD 4dr Sedan 4.2L 8cyl 5A · AWD MPG 15 / 23Range 356 / 545 mi | 4.2L 8cyl 5A | AWD | 23.7 gal90 L | 15 / 23 | 356 / 545 mi | |
| L quattro AWD 4dr Sedan 4.2L 8cyl 5A · AWD MPG 15 / 23Range 363 / 557 mi | 4.2L 8cyl 5A | AWD | 24.2 gal92 L | 15 / 23 | 363 / 557 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 2003 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 18 MPG, a full 24.2-gallon tank covers about 436 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 24.2 | 557 | 363 |
| 3/4 | 18.2 | 417 | 272 |
| 1/2 | 12.1 | 278 | 182 |
| 1/4 | 6.1 | 139 | 91 |
| 1/8 | 3.0 | 70 | 45 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 34 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.
- EPA combined
- 18 MPG
- Tailpipe CO2
- 494 g/mi
- Source
- EPA ratings
What it costs to fill up a 2003 Audi A8
$127.78 to fill the 24.2-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 |
|---|---|---|---|---|
| 23.7 gal | Premium | $5.28 | $125.14 | $93.85 |
| 24.2 gal | Premium | $5.28 | $127.78 | $95.83 |
By region, 24.2-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $119.31 |
| Midwest | $5.37 | $129.95 |
| Gulf CoastLowest | $4.57 | $110.59 |
| Rocky Mountain | $5.12 | $123.90 |
| West Coast | $6.08 | $147.14 |
| CaliforniaHighest | $6.36 | $153.91 |
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
- 23.7-gallon tank$125.14
- 24.2-gallon tank$127.78
- A year of driving (15,000 mi)$4,400
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 2003 A8 uses the same 23.7–24.2 gal tank sizes as every A8 since 2001.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2008 A8 | 23.8 gal | 547 mi |
| 2007 A8 | 23.8 gal | 547 mi |
| 2006 A8 | 23.8 gal | 524 mi |
| 2005 A8 | 23.8 gal | 524 mi |
| 2004 A8 | 23.7 gal | 521 mi |
| 2003 A8 | 23.7–24.2 gal | 557 mi |
| 2002 A8 | 23.7–24.2 gal | 557 mi |
| 2001 A8 | 23.7–24.2 gal | 557 mi |
| 2000 A8 | 23.0–24.2 gal | 532 mi |
| 1999 A8 | 23.7 gal | 569 mi |
| 1998 A8 | 23.7 gal | 569 mi |
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2003 Audi A8 vs similar 2003 sedans
The A8 has the largest tank of the four 2003 sedans compared here, 24.2 gallons against 23.1 for the Jaguar XJ-Series.
| 2003 model | Tank | Longest highway range |
|---|---|---|
| Audi A8 | 23.7–24.2 gal | 557 mi |
| Jaguar XJ-Series | 23.1 gal | 508 mi |
| Acura RL | 18.0 gal | 396 mi |
| Lincoln LS | 18.0 gal | 432 mi |
Other 2003 sedans of a similar size, one model per brand.
2003 Audi A8 fuel system recalls
None of the 1 recall NHTSA lists for the 2003 Audi A8 involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2003 Audi A8?
The 2003 Audi A8 holds between 23.7 and 24.2 gallons, depending on the trim. 24.2 gallons is the usual size; the smaller 23.7-gallon tank is on the quattro AWD 4dr Sedan.
How many gallons and liters does the 2003 Audi A8 gas tank hold?
The 2003 Audi A8 tank holds 90–92 liters, or 23.7–24.2 gallons in US gallons.
Which 2003 Audi A8 has the biggest gas tank?
The 24.2-gallon tank is on the L quattro AWD 4dr Sedan. The smallest tank, 23.7 gallons, is on the quattro AWD 4dr Sedan.
How far can a 2003 Audi A8 go on a full tank?
About 545–557 miles on the highway and 356–363 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 2003 Audi A8 go on a quarter tank?
About 139 highway miles or 91 in town from the 24.2-gallon tank, which has roughly 6.1 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2003 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 2003 Audi A8?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 24.2-gallon tank from empty costs $127.78. It ranges from $110.59 in the Gulf Coast to $153.91 in California.
How much does a full tank of gas weigh in a 2003 Audi A8?
About 150 pounds for the 24.2-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2003 Audi A8 have a bigger gas tank than the Jaguar XJ-Series?
Yes. The 2003 Audi A8 holds up to 24.2 gallons; the 2003 Jaguar XJ-Series holds up to 23.1.
Has the 2003 Audi A8 had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 2003 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 (fueleconomy.gov). 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.