1991 · Large Car · Gas
1991 Mercury Grand Marquis MPG & fuel economy
The 1991 Mercury Grand Marquis is a large car with one EPA-rated configuration. The most efficient version returns 18 MPG combined (15 city / 22 highway) on regular gasoline. Efficiency is unchanged from the 1990 model. Among 18 large cars rated for 1991, it ranks 13th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,583 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 1991 Mercury Grand Marquis's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.4 km/L in the city and 9.4 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 15 | 6.4 | 15.7 |
| Highway | 22 | 9.4 | 10.7 |
| Combined | 18 | 7.7 | 13.1 |
How it ranks among 1991 Large Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
Grand Marquis MPG across model years
Full history →1 EPA-rated configuration
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 5.0L 8-cyl · 4-speed automatic Grand Marquis |
Gas | 15 MPG | 22 MPG | 18 MPG | — | $2,583 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 5.0L 8-cyl
- Transmission
- 4-speed automatic
- Drivetrain
- RWD
- Passenger volume
- 111 cu ft
- Cargo volume
- 21 cu ft
- Tailpipe CO₂
- 494 g/mi
1991 Mercury Grand Marquis vs. rivals
Compare the 1991 Grand Marquis
With any other car from any year, including other Grand Marquis model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 1991 Mercury Grand Marquis?
Up to 18 MPG combined (15 city / 22 highway).
What fuel does the 1991 Mercury Grand Marquis use?
Regular gasoline.
What is the fuel average in km/L for the 1991 Mercury Grand Marquis?
The 1991 Mercury Grand Marquis's fuel average is 7.7 km/L (13.1 L/100 km), or 18 MPG combined: 6.4 km/L in the city and 9.4 km/L on the highway.
How much does it cost to fuel the 1991 Mercury Grand Marquis per year?
About $2,583 at 15,000 miles a year with $3.10/gal regular gas, or $17.22 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.