2007 Cadillac STS vs. 2008 Mercury Mariner
To start off, 2008 Mercury Mariner is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS would be higher. At 3,556 cc (6 cylinders), 2007 Cadillac STS is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (254 HP @ 6500 RPM) has 121 more horse power than 2008 Mercury Mariner. (133 HP @ 6000 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2008 Mercury Mariner. With that said, vehicle weight also plays an important factor in acceleration. 2008 Mercury Mariner weights approximately 143 kg more than 2007 Cadillac STS.
Because 2007 Cadillac STS is four wheel drive (4WD), it will have significant more traction and grip than 2008 Mercury Mariner. In wet, icy, snow, or gravel driving conditions, 2007 Cadillac STS 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, 2007 Cadillac STS (342 Nm @ 3200 RPM) has 174 more torque (in Nm) than 2008 Mercury Mariner. (168 Nm @ 4250 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2008 Mercury Mariner.
Compare all specifications:
| 2007 Cadillac STS | 2008 Mercury Mariner | |
| Make | Cadillac | Mercury |
| Model | STS | Mariner |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 3556 cc | 2299 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 254 HP | 133 HP |
| Engine RPM | 6500 RPM | 6000 RPM |
| Torque | 342 Nm | 168 Nm |
| Torque RPM | 3200 RPM | 4250 RPM |
| Engine Bore Size | 94 mm | 87.4 mm |
| Engine Stroke Size | 85.6 mm | 94 mm |
| Engine Compression Ratio | 10.5:1 | 12.3:1 |
| Fuel Type | Gasoline | Gasoline / Electric Hybrid |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1782 kg | 1925 kg |
| Vehicle Length | 4990 mm | 4460 mm |
| Vehicle Width | 1850 mm | 1810 mm |
| Vehicle Height | 1470 mm | 1730 mm |
| Wheelbase Size | 2960 mm | 2630 mm |
| Fuel Consumption Overall | 12.4 L/100km | 7.6 L/100km |
| Fuel Tank Capacity | 66 L | 57 L |
