2004 Alfa Romeo 156 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 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2004 Alfa Romeo 156 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 (197 HP @ 5400 RPM) has 84 more horse power than 2004 Alfa Romeo 156. (113 HP @ 4000 RPM) In normal driving conditions, 2006 Opel Astra should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Alfa Romeo 156 weights approximately 19 kg more than 2006 Opel Astra.
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, 2004 Alfa Romeo 156 (275 Nm @ 2000 RPM) has 13 more torque (in Nm) than 2006 Opel Astra. (262 Nm @ 4200 RPM). This means 2004 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Astra.
Compare all specifications:
| 2004 Alfa Romeo 156 | 2006 Opel Astra | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Astra |
| Year Released | 2004 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1969 cc | 1998 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 113 HP | 197 HP |
| Engine RPM | 4000 RPM | 5400 RPM |
| Torque | 275 Nm | 262 Nm |
| Torque RPM | 2000 RPM | 4200 RPM |
| Engine Bore Size | 82 mm | 86 mm |
| Engine Stroke Size | 90.4 mm | 86 mm |
| Engine Compression Ratio | 18.4:1 | 8.8:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 191 km/hour | 230 km/hour |
| Acceleration 0-100mph | 10.3 seconds | 8.2 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 | 1405 kg | 1386 kg |
| Vehicle Length | 4440 mm | 4260 mm |
| Vehicle Width | 1750 mm | 1760 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2620 mm |
| Fuel Consumption Overall | 5.8 L/100km | 9.3 L/100km |
| Fuel Tank Capacity | 63 L | 52 L |
