2006 GMC Sierra vs. 1991 Opel Astra
To start off, 2006 GMC Sierra is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Opel Astra. In addition, the cost of maintenance, including insurance, on 1991 Opel Astra would be higher. At 5,996 cc (8 cylinders), 2006 GMC Sierra is equipped with a bigger engine. In terms of performance, 2006 GMC Sierra (345 HP @ 5200 RPM) has 245 more horse power than 1991 Opel Astra. (100 HP @ 5600 RPM). In normal driving conditions, 2006 GMC Sierra should accelerate faster than 1991 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2006 GMC Sierra weights approximately 1462 kg more than 1991 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 1991 Opel Astra. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 GMC Sierra (515 Nm @ 4000 RPM) has 380 more torque (in Nm) than 1991 Opel Astra. (135 Nm @ 3400 RPM). This means 2006 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1991 Opel Astra.
Compare all specifications:
| 2006 GMC Sierra | 1991 Opel Astra | |
| Make | GMC | Opel |
| Model | Sierra | Astra |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 5996 cc | 1597 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 345 HP | 100 HP |
| Engine RPM | 5200 RPM | 5600 RPM |
| Torque | 515 Nm | 135 Nm |
| Torque RPM | 4000 RPM | 3400 RPM |
| Engine Bore Size | 102 mm | 79 mm |
| Engine Stroke Size | 92 mm | 81.5 mm |
| Engine Compression Ratio | 9.2:1 | 9.8:1 |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 2478 kg | 1016 kg |
| Vehicle Length | 5850 mm | 4060 mm |
| Vehicle Width | 2000 mm | 1690 mm |
| Vehicle Height | 1910 mm | 1430 mm |
| Wheelbase Size | 3650 mm | 2530 mm |
| Fuel Tank Capacity | 98 L | 75 L |
