2005 GMC Sierra vs. 2007 Opel Astra
To start off, 2007 Opel Astra is newer by 2 year(s). Which means there will be less support and parts availability for 2005 GMC Sierra. In addition, the cost of maintenance, including insurance, on 2005 GMC Sierra would be higher. At 5,965 cc (8 cylinders), 2005 GMC Sierra is equipped with a bigger engine. In terms of performance, 2005 GMC Sierra (301 HP) has 162 more horse power than 2007 Opel Astra. (139 HP). In normal driving conditions, 2005 GMC Sierra should accelerate faster than 2007 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2005 GMC Sierra weights approximately 1400 kg more than 2007 Opel Astra. 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 2007 Opel Astra. 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 (488 Nm) has 313 more torque (in Nm) than 2007 Opel Astra. (175 Nm). This means 2005 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Astra.
Compare all specifications:
| 2005 GMC Sierra | 2007 Opel Astra | |
| Make | GMC | Opel |
| Model | Sierra | Astra |
| Year Released | 2005 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 5965 cc | 1796 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 301 HP | 139 HP |
| Torque | 488 Nm | 175 Nm |
| Engine Bore Size | 102 mm | 80.5 mm |
| Engine Stroke Size | 92 mm | 88.2 mm |
| Engine Compression Ratio | 9.4:1 | 10.5:1 |
| Drive Type | 4WD | Front |
| Number of Seats | 3 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 2678 kg | 1278 kg |
| Vehicle Length | 5650 mm | 4260 mm |
| Vehicle Width | 2450 mm | 1760 mm |
| Vehicle Height | 1950 mm | 1470 mm |
| Wheelbase Size | 3380 mm | 2620 mm |
| Fuel Tank Capacity | 129 L | 52 L |
