2008 Opel Signum vs. 2005 Pontiac Grand Prix
To start off, 2008 Opel Signum is newer by 3 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 (200 HP) has 51 more horse power than 2008 Opel Signum. (149 HP) In normal driving conditions, 2005 Pontiac Grand Prix should accelerate faster than 2008 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Signum weights approximately 36 kg more than 2005 Pontiac Grand Prix.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear 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, 2008 Opel Signum (315 Nm) has 17 more torque (in Nm) than 2005 Pontiac Grand Prix. (298 Nm). This means 2008 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2005 Pontiac Grand Prix.
Compare all specifications:
| 2008 Opel Signum | 2005 Pontiac Grand Prix | |
| Make | Opel | Pontiac |
| Model | Signum | Grand Prix |
| Year Released | 2008 | 2005 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 3786 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 149 HP | 200 HP |
| Torque | 315 Nm | 298 Nm |
| Engine Bore Size | 82 mm | 97 mm |
| Engine Stroke Size | 90.4 mm | 86 mm |
| Engine Compression Ratio | 18.0:1 | 9.4:1 |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1613 kg | 1577 kg |
| Vehicle Length | 4640 mm | 5040 mm |
| Vehicle Width | 1800 mm | 1830 mm |
| Vehicle Height | 1470 mm | 1430 mm |
| Wheelbase Size | 2840 mm | 2810 mm |
| Fuel Consumption | 5.1 L/100km | 7.8 L/100km |
| Fuel Consumption City | 7.8 L/100km | 11.8 L/100km |
| Fuel Consumption Overall | 6.1 L/100km | 10.2 L/100km |
| Fuel Tank Capacity | 60 L | 64 L |
