2009 Cadillac STS vs. 2003 Mercury Grand Marquis
To start off, 2009 Cadillac STS is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Mercury Grand Marquis. In addition, the cost of maintenance, including insurance, on 2003 Mercury Grand Marquis would be higher. At 4,604 cc (8 cylinders), 2003 Mercury Grand Marquis is equipped with a bigger engine. In terms of performance, 2009 Cadillac STS (302 HP @ 6300 RPM) has 94 more horse power than 2003 Mercury Grand Marquis. (208 HP @ 4250 RPM). In normal driving conditions, 2009 Cadillac STS should accelerate faster than 2003 Mercury Grand Marquis. With that said, vehicle weight also plays an important factor in acceleration. 2003 Mercury Grand Marquis weights approximately 272 kg more than 2009 Cadillac STS.
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, 2009 Cadillac STS (369 Nm @ 5200 RPM) has 10 more torque (in Nm) than 2003 Mercury Grand Marquis. (359 Nm @ 3000 RPM). This means 2009 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2003 Mercury Grand Marquis.
Compare all specifications:
| 2009 Cadillac STS | 2003 Mercury Grand Marquis | |
| Make | Cadillac | Mercury |
| Model | STS | Grand Marquis |
| Year Released | 2009 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3600 cc | 4604 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 302 HP | 208 HP |
| Engine RPM | 6300 RPM | 4250 RPM |
| Torque | 369 Nm | 359 Nm |
| Torque RPM | 5200 RPM | 3000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1560 kg | 1832 kg |
| Vehicle Length | 5000 mm | 5390 mm |
| Vehicle Width | 1850 mm | 1990 mm |
| Vehicle Height | 1470 mm | 1450 mm |
| Wheelbase Size | 2960 mm | 2760 mm |
| Fuel Consumption Overall | 11.9 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 64 L | 72 L |
