2006 Cadillac STS vs. 1998 Mercury Grand Marquis
To start off, 2006 Cadillac STS is newer by 8 year(s). Which means there will be less support and parts availability for 1998 Mercury Grand Marquis. In addition, the cost of maintenance, including insurance, on 1998 Mercury Grand Marquis would be higher. At 4,603 cc (8 cylinders), 1998 Mercury Grand Marquis is equipped with a bigger engine. In terms of performance, 2006 Cadillac STS (320 HP @ 6400 RPM) has 97 more horse power than 1998 Mercury Grand Marquis. (223 HP @ 4500 RPM). In normal driving conditions, 2006 Cadillac STS should accelerate faster than 1998 Mercury Grand Marquis.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2006 Cadillac STS (428 Nm @ 4400 RPM) has 56 more torque (in Nm) than 1998 Mercury Grand Marquis. (372 Nm @ 3000 RPM). This means 2006 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 1998 Mercury Grand Marquis.
Compare all specifications:
| 2006 Cadillac STS | 1998 Mercury Grand Marquis | |
| Make | Cadillac | Mercury |
| Model | STS | Grand Marquis |
| Year Released | 2006 | 1998 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4556 cc | 4603 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 223 HP |
| Engine RPM | 6400 RPM | 4500 RPM |
| Torque | 428 Nm | 372 Nm |
| Torque RPM | 4400 RPM | 3000 RPM |
| Engine Bore Size | 93 mm | 90.2 mm |
| Engine Stroke Size | 84 mm | 90 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4990 mm | 5390 mm |
| Vehicle Width | 1850 mm | 2000 mm |
| Vehicle Height | 1470 mm | 1450 mm |
| Wheelbase Size | 2960 mm | 2920 mm |
| Fuel Consumption Overall | 11.8 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 64 L | 68 L |
