2009 Cadillac STS vs. 2003 Pontiac Grand Prix
To start off, 2009 Cadillac STS is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Pontiac Grand Prix. In addition, the cost of maintenance, including insurance, on 2003 Pontiac Grand Prix would be higher. At 3,599 cc (6 cylinders), 2009 Cadillac STS is equipped with a bigger engine. In terms of performance, 2009 Cadillac STS (302 HP @ 6300 RPM) has 128 more horse power than 2003 Pontiac Grand Prix. (174 HP @ 5200 RPM). In normal driving conditions, 2009 Cadillac STS should accelerate faster than 2003 Pontiac Grand Prix. With that said, vehicle weight also plays an important factor in acceleration. 2009 Cadillac STS weights approximately 100 kg more than 2003 Pontiac Grand Prix. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 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 2009 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2003 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, 2009 Cadillac STS (369 Nm @ 5200 RPM) has 105 more torque (in Nm) than 2003 Pontiac Grand Prix. (264 Nm @ 4000 RPM). This means 2009 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2003 Pontiac Grand Prix.
Compare all specifications:
| 2009 Cadillac STS | 2003 Pontiac Grand Prix | |
| Make | Cadillac | Pontiac |
| Model | STS | Grand Prix |
| Year Released | 2009 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3599 cc | 3130 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 302 HP | 174 HP |
| Engine RPM | 6300 RPM | 5200 RPM |
| Torque | 369 Nm | 264 Nm |
| Torque RPM | 5200 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1635 kg | 1535 kg |
| Vehicle Length | 5000 mm | 5000 mm |
| Vehicle Width | 1850 mm | 1850 mm |
| Vehicle Height | 1470 mm | 1400 mm |
| Wheelbase Size | 2960 mm | 3160 mm |
| Fuel Tank Capacity | 64 L | 66 L |
