2002 Alfa Romeo 156 vs. 2004 Opel Omega
To start off, 2004 Opel Omega is newer by 2 year(s). Which means there will be less support and parts availability for 2002 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2002 Alfa Romeo 156 would be higher. At 2,198 cc (4 cylinders), 2004 Opel Omega is equipped with a bigger engine. In terms of performance, 2004 Opel Omega (142 HP @ 5400 RPM) has 4 more horse power than 2002 Alfa Romeo 156. (138 HP @ 6500 RPM) In normal driving conditions, 2004 Opel Omega should accelerate faster than 2002 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Omega weights approximately 325 kg more than 2002 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Opel Omega is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2004 Opel Omega. However, in wet, icy, snow, or gravel driving conditions, 2002 Alfa Romeo 156, being front wheel drive (FWD), will offer much better control with better grip. 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 Opel Omega (209 Nm @ 4000 RPM) has 45 more torque (in Nm) than 2002 Alfa Romeo 156. (164 Nm @ 3900 RPM). This means 2004 Opel Omega will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 156.
Compare all specifications:
| 2002 Alfa Romeo 156 | 2004 Opel Omega | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Omega |
| Year Released | 2002 | 2004 |
| Engine Position | Front | Middle |
| Engine Size | 1747 cc | 2198 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 142 HP |
| Engine RPM | 6500 RPM | 5400 RPM |
| Torque | 164 Nm | 209 Nm |
| Torque RPM | 3900 RPM | 4000 RPM |
| Engine Bore Size | 82 mm | 86 mm |
| Engine Stroke Size | 82.7 mm | 94.6 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1340 kg | 1665 kg |
| Vehicle Length | 4440 mm | 4900 mm |
| Vehicle Width | 1750 mm | 1790 mm |
| Vehicle Height | 1400 mm | 1510 mm |
| Wheelbase Size | 2710 mm | 2740 mm |
| Fuel Tank Capacity | 63 L | 75 L |
