Research 1998 Mercury Grand Marquis specs for the trims available. Choose the desired trim / style from the dropdown list to see the corresponding specs.

GS 4dr Sedan GS


Brake Type Power
Front Brake Rotor Diam x Thickness (in) 12.4 x 1.1
Rear Brake Rotor Diam x Thickness (in) 11.1 x 0.55
Drum - Rear (Yes or )
Rear Drum Diam x Width (in)
Disc - Rear (Yes or ) Yes
Disc - Front (Yes or ) Yes
Brake ABS System
Brake ABS System 4-Wheel

Cargo Area Dimensions

Trunk Volume (ft³) 20.6

Cooling System

Total Cooling System Capacity (qts) 13.6


Maximum Alternator Capacity (amps) 130
Cold Cranking Amps @ 0° F (Primary) 650


Engine Order Code 99W
SAE Net Horsepower @ RPM 200 @ 4250
Engine Type Gas V8
Displacement 4.6L/281
Fuel System SEFI
SAE Net Horsepower @ RPM 215 @ 4500
SAE Net Torque @ RPM 285 @ 3000
SAE Net Torque @ RPM 275 @ 3000

Exterior Dimensions

Liftover Height (in) 26.6
Track Width, Front (in) 63.4
Height, Overall (in) 56.8
Width, Max w/o mirrors (in) 78.2
Length, Overall (in) 211.9
Wheelbase (in) 114.7
Min Ground Clearance (in) 5.2
Track Width, Rear (in) 65.3

Fuel Tank

Fuel Tank Capacity, Approx (gal) 19.0

Interior Dimensions

Front Head Room (in) 39.4
Second Head Room (in) 38.1
Second Leg Room (in) 38.4
Second Shoulder Room (in) 60.3
Second Hip Room (in) 59.0
Front Leg Room (in) 42.5
Passenger Capacity 6
Passenger Volume (ft³) 109.3
Front Hip Room (in) 58.0
Front Shoulder Room (in) 60.1


EPA Fuel Economy Est - Hwy (MPG) 24
EPA Fuel Economy Est - City (MPG) 17


Turning Diameter - Wall to Wall (ft) 43.1
Steering Ratio (:1), Overall 16.4
Steering Type Speed-Sensitive Pwr Recirculating Ball
Lock to Lock Turns (Steering) 3.4
Turning Diameter - Curb to Curb (ft) 40.3


Body Style 4 Door Sedan GS
Vehicle Name Mercury Grand Marquis


Suspension Type - Front (Cont.) w/Coil Springs
Suspension Type - Rear Watt's Linkage
Suspension Type - Rear (Cont.) w/Coil Springs
Shock Absorber Diameter - Front (mm) 30.0
Shock Absorber Diameter - Rear (mm) 30.0
Stabilizer Bar Diameter - Front (in) 1.18
Stabilizer Bar Diameter - Front (in) 1.12
Stabilizer Bar Diameter - Rear (in) - TBD -
Stabilizer Bar Diameter - Rear (in) 0.71
Suspension Type - Front Independent SLA


Front Tire Order Code T2A
Front Tire Order Code T31
Rear Tire Order Code T31
Rear Tire Order Code T2A
Spare Tire Order Code 508
Spare Tire Order Code
Front Tire Size P225/60SR16
Rear Tire Size P225/60SR16
Spare Tire Size P225/60SR16
Spare Tire Size T145/80D16


Wt Distributing Hitch - Max Tongue Wt. (lbs) 200
Dead Weight Hitch - Max Trailer Wt. (lbs) 2000
Dead Weight Hitch - Max Tongue Wt. (lbs) 200
Wt Distributing Hitch - Max Trailer Wt. (lbs) 2000


Drivetrain Rear Wheel Drive
Reverse Ratio (:1) 2.32
Sixth Gear Ratio (:1)
Fifth Gear Ratio (:1)
Fourth Gear Ratio (:1) 0.70
Third Gear Ratio (:1) 1.00
Second Gear Ratio (:1) 1.56
First Gear Ratio (:1) 2.84
Trans Description Cont. Again Electronic
Trans Description Cont. Automatic w/OD,
Trans Type 4
Trans Order Code 44U
Final Drive Axle Ratio (:1) 2.73
Final Drive Axle Ratio (:1) 3.27
Clutch Size (in)


EPA Classification Large

Weight Information

Base Curb Weight (lbs) 3917


Rear Wheel Size (in) 16 x 7.0
Front Wheel Size (in) 16 x 7.0
Front Wheel Material Aluminum
Front Wheel Material Steel
Rear Wheel Material Aluminum
Rear Wheel Material Steel
Spare Wheel Size (in) 16 x 4.5
Spare Wheel Material Steel
Spare Wheel Size (in) 16 x 7.0