2009 Cadillac STS vs. 2007 Mercury Mariner
To start off, 2009 Cadillac STS is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Mercury Mariner. In addition, the cost of maintenance, including insurance, on 2007 Mercury Mariner would be higher. At 4,565 cc (8 cylinders), 2009 Cadillac STS is equipped with a bigger engine. In terms of performance, 2009 Cadillac STS (320 HP @ 6400 RPM) has 187 more horse power than 2007 Mercury Mariner. (133 HP @ 6000 RPM). In normal driving conditions, 2009 Cadillac STS should accelerate faster than 2007 Mercury Mariner. With that said, vehicle weight also plays an important factor in acceleration. 2007 Mercury Mariner weights approximately 365 kg more than 2009 Cadillac STS.
Because 2007 Mercury Mariner is four wheel drive (4WD), it will have significant more traction and grip than 2009 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 2007 Mercury Mariner will offer significantly more control. 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 (427 Nm @ 4400 RPM) has 259 more torque (in Nm) than 2007 Mercury Mariner. (168 Nm @ 4250 RPM). This means 2009 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2007 Mercury Mariner.
Compare all specifications:
| 2009 Cadillac STS | 2007 Mercury Mariner | |
| Make | Cadillac | Mercury |
| Model | STS | Mariner |
| Year Released | 2009 | 2007 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 2299 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 320 HP | 133 HP |
| Engine RPM | 6400 RPM | 6000 RPM |
| Torque | 427 Nm | 168 Nm |
| Torque RPM | 4400 RPM | 4250 RPM |
| Engine Compression Ratio | 10.2:1 | 12.4:1 |
| Fuel Type | Gasoline | Gasoline / Electric Hybrid |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1560 kg | 1925 kg |
| Vehicle Length | 5000 mm | 4430 mm |
| Vehicle Width | 1850 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1790 mm |
| Wheelbase Size | 2960 mm | 2630 mm |
| Fuel Consumption City | 15.7 L/100km | 7.1 L/100km |
| Fuel Consumption Overall | 13.1 L/100km | 7.6 L/100km |
| Fuel Tank Capacity | 64 L | 57 L |
