2008 Audi A8 vs. 2005 Opel Astra
To start off, 2008 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Opel Astra. In addition, the cost of maintenance, including insurance, on 2005 Opel Astra would be higher. At 4,171 cc (8 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (330 HP @ 6500 RPM) has 216 more horse power than 2005 Opel Astra. (114 HP @ 5400 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 670 kg more than 2005 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Opel Astra. In wet, icy, snow, or gravel driving conditions, 2008 Audi A8 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, 2008 Audi A8 (430 Nm @ 3500 RPM) has 257 more torque (in Nm) than 2005 Opel Astra. (173 Nm @ 3400 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra. 2008 Audi A8 has automatic transmission and 2005 Opel Astra has manual transmission. 2005 Opel Astra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi A8 | 2005 Opel Astra | |
| Make | Audi | Opel |
| Model | A8 | Astra |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4171 cc | 1796 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 330 HP | 114 HP |
| Engine RPM | 6500 RPM | 5400 RPM |
| Torque | 430 Nm | 173 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Bore Size | 84.5 mm | 80.6 mm |
| Engine Stroke Size | 93 mm | 88.2 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1855 kg | 1185 kg |
| Vehicle Length | 5060 mm | 4260 mm |
| Vehicle Width | 1900 mm | 1720 mm |
| Vehicle Height | 1450 mm | 1400 mm |
| Wheelbase Size | 2950 mm | 2610 mm |
| Fuel Tank Capacity | 90 L | 52 L |
