2004 Audi A4 vs. 2006 Opel Astra
To start off, 2006 Opel Astra is newer by 2 year(s). Which means there will be less support and parts availability for 2004 Audi A4. In addition, the cost of maintenance, including insurance, on 2004 Audi A4 would be higher. At 1,998 cc (4 cylinders), 2006 Opel Astra is equipped with a bigger engine. In terms of performance, 2006 Opel Astra (198 HP @ 5400 RPM) has 38 more horse power than 2004 Audi A4. (160 HP @ 5700 RPM) In normal driving conditions, 2006 Opel Astra should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Astra weights approximately 90 kg more than 2004 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2006 Opel Astra (262 Nm @ 4200 RPM) has 37 more torque (in Nm) than 2004 Audi A4. (225 Nm @ 1950 RPM). This means 2006 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4.
Compare all specifications:
| 2004 Audi A4 | 2006 Opel Astra | |
| Make | Audi | Opel |
| Model | A4 | Astra |
| Year Released | 2004 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1998 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 160 HP | 198 HP |
| Engine RPM | 5700 RPM | 5400 RPM |
| Torque | 225 Nm | 262 Nm |
| Torque RPM | 1950 RPM | 4200 RPM |
| Engine Bore Size | 81.1 mm | 86 mm |
| Engine Stroke Size | 86.4 mm | 86 mm |
| Engine Compression Ratio | 9.3:1 | 8.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 8.6 seconds | 8.4 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1335 kg | 1425 kg |
| Vehicle Length | 4550 mm | 4520 mm |
| Vehicle Width | 1780 mm | 1800 mm |
| Vehicle Height | 1430 mm | 1510 mm |
| Wheelbase Size | 2470 mm | 2710 mm |
| Fuel Consumption Overall | 8.6 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 70 L | 52 L |
