2005 GMC Sierra vs. 2004 Opel Signum
To start off, 2005 GMC Sierra is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Opel Signum. In addition, the cost of maintenance, including insurance, on 2004 Opel Signum would be higher. At 5,964 cc (8 cylinders), 2005 GMC Sierra is equipped with a bigger engine. In terms of performance, 2005 GMC Sierra (340 HP @ 5200 RPM) has 217 more horse power than 2004 Opel Signum. (123 HP @ 6000 RPM). In normal driving conditions, 2005 GMC Sierra should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2005 GMC Sierra weights approximately 865 kg more than 2004 Opel Signum. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 2004 Opel Signum. In wet, icy, snow, or gravel driving conditions, 2005 GMC Sierra 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, 2005 GMC Sierra (516 Nm @ 4000 RPM) has 349 more torque (in Nm) than 2004 Opel Signum. (167 Nm @ 3800 RPM). This means 2005 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum. 2005 GMC Sierra has automatic transmission and 2004 Opel Signum has manual transmission. 2004 Opel Signum will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 GMC Sierra will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 GMC Sierra | 2004 Opel Signum | |
| Make | GMC | Opel |
| Model | Sierra | Signum |
| Year Released | 2005 | 2004 |
| Body Type | Pickup | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 5964 cc | 1796 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 340 HP | 123 HP |
| Engine RPM | 5200 RPM | 6000 RPM |
| Torque | 516 Nm | 167 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 102 mm | 80.5 mm |
| Engine Stroke Size | 92 mm | 88.2 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 2345 kg | 1480 kg |
| Vehicle Length | 5740 mm | 4640 mm |
| Vehicle Width | 2000 mm | 1800 mm |
| Vehicle Height | 1910 mm | 1470 mm |
| Wheelbase Size | 3650 mm | 2640 mm |
