2009 Audi A4 vs. 2005 Opel Astra
To start off, 2009 Audi A4 is newer by 4 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 2,172 cc (4 cylinders), 2005 Opel Astra is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (158 HP @ 4500 RPM) has 35 more horse power than 2005 Opel Astra. (123 HP @ 4000 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Opel Astra weights approximately 490 kg more than 2009 Audi A4.
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, 2005 Opel Astra (281 Nm @ 1500 RPM) has 31 more torque (in Nm) than 2009 Audi A4. (250 Nm @ 1500 RPM). This means 2005 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2005 Opel Astra | |
| Make | Audi | Opel |
| Model | A4 | Astra |
| Year Released | 2009 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 1798 cc | 2172 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 158 HP | 123 HP |
| Engine RPM | 4500 RPM | 4000 RPM |
| Torque | 250 Nm | 281 Nm |
| Torque RPM | 1500 RPM | 1500 RPM |
| Engine Bore Size | 82.5 mm | 84 mm |
| Engine Stroke Size | 84.1 mm | 98 mm |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 225 km/hour | 207 km/hour |
| Acceleration 0-100mph | 8.6 seconds | 9.9 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 895 kg | 1385 kg |
| Vehicle Length | 4710 mm | 4270 mm |
| Vehicle Width | 2010 mm | 1720 mm |
| Vehicle Height | 1430 mm | 1400 mm |
| Wheelbase Size | 2810 mm | 2530 mm |
| Fuel Consumption Overall | 7.1 L/100km | 6.3 L/100km |
| Fuel Tank Capacity | 65 L | 52 L |
