1991 Mercury Grand Marquis
US · Large Cars
The 1991 Mercury Grand Marquis is listed in the US market with gasoline power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- 5.0L 8-cylinder (FFS)
- Transmission
- 4-speed automatic
- Drivetrain
- RWD
- Fuel
- Gasoline
- Economy
- 18 mpg (13.1 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | 5.0L 8-cylinder (FFS) | |
| Displacement | 5.0 L | |
| Cylinders | 8 | |
| Fuel type | Gasoline | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 4 | |
| Drivetrain | RWD | EPA fueleconomy.gov |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 18 mpg (13.1 L/100 km) | EPA fueleconomy.gov |
| City | 15 mpg (15.7 L/100 km) | |
| Highway | 22 mpg (10.7 L/100 km) |
Our sources do not publish these for this vehicle: Aspiration, Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
2 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
NHTSA lists 2 recall campaigns for this model year. Last checked November 7, 2026.
91V048000: POWER TRAIN:AUTOMATIC TRANSMISSION
THE PARK ROD ASSEMBLY CONTAINS A PARK CAM WITH INADEQUATE SURFACE HARDNESS, WHICH COULD LEAD TO PARK DISENGAGEMENT OR NO PARK ENGAGEMENT WHEN THE LEVER IS PLACED IN PARK.
Remedy: REPLACE PARK ROD ASSEMBLY ON AUTOMATIC TRANSMISSIONS.
Reported March 18, 1991. View on NHTSA
90E043001: AIR BAGS:FRONTAL
THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.
Remedy: REPLACE AIR BAG MODULES CONTAINING POTENTIALLY DEFECTIVE INFLATORS.
Reported October 30, 1990. View on NHTSA
Data sources
- EPA fueleconomy.gov · retrieved October 21, 2026 · US Government public data
- NHTSA vPIC · retrieved October 21, 2026 · US Government public data
Source checked: October 21, 2026
Data verified: October 21, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Related vehicles
- 1990 Mercury Grand Marquis
Gasoline
5.0L 8-cylinder ((FFS)) · RWD
18 mpg (13.1 L/100 km) - 1992 Mercury Grand Marquis
Gasoline
4.6L 8-cylinder ((FFS)) · RWD
20 mpg (11.8 L/100 km) to 19 mpg (12.4 L/100 km)
Frequently asked questions
What engine does the 1991 Mercury Grand Marquis have?
5.0L 8-cylinder ((FFS)). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 1991 Mercury Grand Marquis?
Combined fuel economy is 18 mpg (13.1 L/100 km), as published by the source shown in the specification table.
Is the 1991 Mercury Grand Marquis front-wheel, rear-wheel or all-wheel drive?
Drivetrain: RWD.
Are there recalls for the 1991 Mercury Grand Marquis?
NHTSA lists 2 recall campaigns for this model year (last checked November 7, 2026). Details are in the Recalls section.