2006 Cadillac STS vs. 2005 Pontiac Grand Prix
To start off, 2006 Cadillac STS is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Pontiac Grand Prix. In addition, the cost of maintenance, including insurance, on 2005 Pontiac Grand Prix would be higher. At 3,786 cc (6 cylinders), 2005 Pontiac Grand Prix is equipped with a bigger engine. In terms of performance, 2005 Pontiac Grand Prix (260 HP @ 5200 RPM) has 7 more horse power than 2006 Cadillac STS. (253 HP @ 6500 RPM) In normal driving conditions, 2005 Pontiac Grand Prix should accelerate faster than 2006 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2006 Cadillac STS weights approximately 162 kg more than 2005 Pontiac Grand Prix.
Because 2006 Cadillac STS is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2005 Pontiac Grand Prix, being front wheel drive (FWD), will offer much better control with better grip. 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 Pontiac Grand Prix (380 Nm) has 38 more torque (in Nm) than 2006 Cadillac STS. (342 Nm). This means 2005 Pontiac Grand Prix will have an easier job in driving up hills or pulling heavy equipment than 2006 Cadillac STS.
Compare all specifications:
| 2006 Cadillac STS | 2005 Pontiac Grand Prix | |
| Make | Cadillac | Pontiac |
| Model | STS | Grand Prix |
| Year Released | 2006 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3563 cc | 3786 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 253 HP | 260 HP |
| Engine RPM | 6500 RPM | 5200 RPM |
| Torque | 342 Nm | 380 Nm |
| Engine Bore Size | 94 mm | 97.1 mm |
| Engine Stroke Size | 85.6 mm | 86 mm |
| Engine Compression Ratio | 10.2:1 | 8.5:1 |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1782 kg | 1620 kg |
| Vehicle Length | 4990 mm | 5040 mm |
| Vehicle Width | 1850 mm | 1830 mm |
| Vehicle Height | 1470 mm | 1420 mm |
| Wheelbase Size | 2960 mm | 2810 mm |
| Fuel Consumption Highway | 8.7 L/100km | 8.4 L/100km |
| Fuel Consumption City | 13.1 L/100km | 12.4 L/100km |
| Fuel Consumption Overall | 12.4 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 66 L | 64 L |
