Premium 4dr SUV AWD w/55 TFSI3.0L 6cyl Turbo mild hybrid 8A · AWDMPG 18 / 23Range 405 / 518 mi
3.0L 6cyl Turbo mild hybrid 8A
AWD
22.5 gal85 L
18 / 23
405 / 518 mi
Premium Plus 4dr SUV AWD w/55 TFSI3.0L 6cyl Turbo mild hybrid 8A · AWDMPG 18 / 23Range 405 / 518 mi
3.0L 6cyl Turbo mild hybrid 8A
AWD
22.5 gal85 L
18 / 23
405 / 518 mi
Prestige 4dr SUV AWD w/55 TFSI3.0L 6cyl Turbo mild hybrid 8A · AWDMPG 18 / 23Range 405 / 518 mi
3.0L 6cyl Turbo mild hybrid 8A
AWD
22.5 gal85 L
18 / 23
405 / 518 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 2021 Audi Q8 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 20 MPG, a full 22.5-gallon tank covers about 450 miles.
Gauge
Gallons
Highway miles
City miles
Full
22.5
518
405
3/4
16.9
388
304
1/2
11.3
259
203
1/4
5.6
129
101
1/8
2.8
65
51
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 750 gallons, roughly 33 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 2021 Audi Q8
$118.80to fill the 22.5-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
At 22.5 gallons, the Q8's largest tank ranks third of the seven 2021 SUVs compared here. The Land Rover Discovery carries the most (24.0 gal) and the Lexus RX 450hL the least (17.2 gal).
Other 2021 SUVs of a similar size, one model per brand.
2021 Audi Q8 fuel system recalls
NHTSA lists 1 fuel-system recall for the 2021 Audi Q8, out of 7 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Delivery · Fuel pumpJul 20, 2022 · NHTSA 22V516000 · Volkswagen Group Of America, Inc. · 49,443 vehicles
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2019-2021 Audi Q8, and 2020-2021 Audi Q7 vehicles. A component inside the fuel pump may break, causing the fuel pump to fail.
Risk and remedy
Risk: Fuel pump failure can cause an engine stall, increasing the risk of a crash.
Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed December 22, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 20DR.
What is the fuel tank capacity of the 2021 Audi Q8?
The 2021 Audi Q8 holds 22.5 gallons (85 liters) on every trim we list.
How many gallons and liters does the 2021 Audi Q8 gas tank hold?
The 2021 Audi Q8 tank holds 85 liters, or 22.5 gallons in US gallons.
How far can a 2021 Audi Q8 go on a full tank?
About 518 miles on the highway and 405 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 2021 Audi Q8 go on a quarter tank?
About 129 highway miles or 101 in town from the 22.5-gallon tank, which has roughly 5.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2021 Audi Q8 take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Audi Q8?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 22.5-gallon tank from empty costs $118.80. It ranges from $102.83 in the Gulf Coast to $143.10 in California.
How much does a full tank of gas weigh in a 2021 Audi Q8?
About 140 pounds for the 22.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Audi Q8 have a bigger gas tank than the Mercedes-Benz GLE-Class?
No, they match: both top out at 22.5 gallons in 2021.
Has the 2021 Audi Q8 had a fuel pump or fuel system recall?
Yes. NHTSA lists 1 fuel-system recall for the 2021 Audi Q8: 22V516000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
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).