2005 Audi S4 vs. 2006 Opel Astra
To start off, 2006 Opel Astra is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 4,161 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 172 more horse power than 2006 Opel Astra. (168 HP @ 5200 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2006 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 325 kg more than 2006 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi S4 (410 Nm) has 160 more torque (in Nm) than 2006 Opel Astra. (250 Nm). This means 2005 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Astra.
Compare all specifications:
| 2005 Audi S4 | 2006 Opel Astra | |
| Make | Audi | Opel |
| Model | S4 | Astra |
| Year Released | 2005 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 1998 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 168 HP |
| Engine RPM | 6300 RPM | 5200 RPM |
| Torque | 410 Nm | 250 Nm |
| Engine Bore Size | 85 mm | 86 mm |
| Engine Stroke Size | 93 mm | 86 mm |
| Engine Compression Ratio | 11.0:1 | 8.8:1 |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1840 kg | 1515 kg |
| Vehicle Length | 4580 mm | 4480 mm |
| Vehicle Width | 1780 mm | 2030 mm |
| Vehicle Height | 1400 mm | 1420 mm |
| Wheelbase Size | 2660 mm | 2620 mm |
| Fuel Consumption Overall | 11.8 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 63 L | 52 L |
