2009 Cadillac STS vs. 2005 Infiniti QX56
To start off, 2009 Cadillac STS is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Infiniti QX56. In addition, the cost of maintenance, including insurance, on 2005 Infiniti QX56 would be higher. At 5,555 cc (8 cylinders), 2005 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2005 Infiniti QX56 (315 HP @ 6400 RPM) has 13 more horse power than 2009 Cadillac STS. (302 HP @ 6300 RPM) In normal driving conditions, 2005 Infiniti QX56 should accelerate faster than 2009 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti QX56 weights approximately 796 kg more than 2009 Cadillac STS. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2005 Infiniti QX56 (529 Nm) has 160 more torque (in Nm) than 2009 Cadillac STS. (369 Nm). This means 2005 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2009 Cadillac STS.
Compare all specifications:
| 2009 Cadillac STS | 2005 Infiniti QX56 | |
| Make | Cadillac | Infiniti |
| Model | STS | QX56 |
| Year Released | 2009 | 2005 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 3599 cc | 5555 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 302 HP | 315 HP |
| Engine RPM | 6300 RPM | 6400 RPM |
| Torque | 369 Nm | 529 Nm |
| Engine Compression Ratio | 11.3:1 | 9.8:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1635 kg | 2431 kg |
| Vehicle Length | 5000 mm | 5260 mm |
| Vehicle Width | 1850 mm | 2010 mm |
| Vehicle Height | 1470 mm | 1960 mm |
| Wheelbase Size | 2960 mm | 3140 mm |
| Fuel Consumption | 9.1 L/100km | 12.4 L/100km |
| Fuel Consumption City | 13.8 L/100km | 18.1 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 64 L | 106 L |
