1991 Ford Thunderbird Gas Tank Size & Fuel Capacity
Fuel tank capacity
19.0gal · 72 L
The 1991 Ford Thunderbird has a fuel tank capacity of 19.0 gallons (72 liters) on every trim.
A full tank is good for roughly 418–456 highway miles or 285–323 miles around town, going by the EPA ratings.
19.0 gal · Bigger than 58% of 1991 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
1991 Ford Thunderbird fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 3 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2dr Coupe 3.8L 6cyl 4A · RWD MPG 17 / 24Range 323 / 456 mi | 3.8L 6cyl 4A | RWD | 19.0 gal72 L | 17 / 24 | 323 / 456 mi | |
| LX 2dr Coupe 3.8L 6cyl 4A · RWD MPG 17 / 24Range 323 / 456 mi | 3.8L 6cyl 4A | RWD | 19.0 gal72 L | 17 / 24 | 323 / 456 mi | |
| SC 2dr Coupe 3.8L 6cyl 5M · RWD MPG 15 / 22Range 285 / 418 mi | 3.8L 6cyl 5M | RWD | 19.0 gal72 L | 15 / 22 | 285 / 418 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 1991 Ford Thunderbird 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 19.0-gallon tank covers about 380 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 19.0 | 456 | 323 |
| 3/4 | 14.3 | 342 | 242 |
| 1/2 | 9.5 | 228 | 162 |
| 1/4 | 4.8 | 114 | 81 |
| 1/8 | 2.4 | 57 | 40 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 750 gallons, roughly 39 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
- 18–20 MPG
- Tailpipe CO2
- 444–494 g/mi
- Source
- EPA ratings
What it costs to fill up a 1991 Ford Thunderbird
$81.13 to fill the 19.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 19.0 gal | Regular | $4.27 | $81.13 | $60.85 |
By region, 19.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $76.38 |
| Midwest | $4.27 | $81.13 |
| Gulf CoastLowest | $3.70 | $70.30 |
| Rocky Mountain | $4.46 | $84.74 |
| West Coast | $5.42 | $102.98 |
| CaliforniaHighest | $5.89 | $111.91 |
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
- 19.0-gallon tank$81.13
- A year of driving (15,000 mi)$3,202
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Thunderbird tank size in other years
The 1991 Thunderbird uses the same 19.0 gal tank as the 1990 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 1996 Thunderbird | 18.0 gal | 432 mi |
| 1995 Thunderbird | 18.0 gal | 432 mi |
| 1994 Thunderbird | 18.0 gal | 432 mi |
| 1993 Thunderbird | 18.0 gal | 432 mi |
| 1992 Thunderbird | 18.0 gal | 450 mi |
| 1991 Thunderbird | 19.0 gal | 456 mi |
| 1990 Thunderbird | 19.0 gal | 456 mi |
1991 Ford Thunderbird vs similar 1991 coupes
The Thunderbird has the largest tank of the four 1991 coupes compared here, 19.0 gallons against 19.0 for the Mercury Cougar.
| 1991 model | Tank | Longest highway range |
|---|---|---|
| Ford Thunderbird | 19.0 gal | 456 mi |
| Mercury Cougar | 19.0 gal | 456 mi |
| Oldsmobile Toronado | 18.8 gal | 451 mi |
| Buick Riviera | 18.8 gal | 451 mi |
Other 1991 coupes of a similar size, one model per brand.
1991 Ford Thunderbird fuel system recalls
None of the 3 recalls NHTSA lists for the 1991 Ford Thunderbird involve the fuel system.
1991 Ford Thunderbird fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 1991 Ford Thunderbird, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 1991 Ford Thunderbird?
The 1991 Ford Thunderbird holds 19.0 gallons (72 liters) on every trim we list.
How many gallons and liters does the 1991 Ford Thunderbird gas tank hold?
The 1991 Ford Thunderbird tank holds 72 liters, or 19.0 gallons in US gallons.
How far can a 1991 Ford Thunderbird go on a full tank?
About 418–456 miles on the highway and 285–323 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 1991 Ford Thunderbird go on a quarter tank?
About 114 highway miles or 81 in town from the 19.0-gallon tank, which has roughly 4.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 1991 Ford Thunderbird take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 1991 Ford Thunderbird?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 19.0-gallon tank from empty costs $81.13. It ranges from $70.30 in the Gulf Coast to $111.91 in California.
How much does a full tank of gas weigh in a 1991 Ford Thunderbird?
About 118 pounds for the 19.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 1991 Ford Thunderbird have a bigger gas tank than the Oldsmobile Toronado?
Yes. The 1991 Ford Thunderbird holds up to 19.0 gallons; the 1991 Oldsmobile Toronado holds up to 18.8.
Has the 1991 Ford Thunderbird had a fuel pump or fuel system recall?
No. None of the 3 recalls NHTSA lists for the 1991 Ford Thunderbird 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 (Ford 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.