2004 Alfa Romeo 156 vs. 1999 Opel Omega
To start off, 2004 Alfa Romeo 156 is newer by 5 year(s). Which means there will be less support and parts availability for 1999 Opel Omega. In addition, the cost of maintenance, including insurance, on 1999 Opel Omega would be higher. At 5,663 cc (8 cylinders), 1999 Opel Omega is equipped with a bigger engine. In terms of performance, 1999 Opel Omega (311 HP @ 5600 RPM) has 163 more horse power than 2004 Alfa Romeo 156. (148 HP @ 4000 RPM) In normal driving conditions, 1999 Opel Omega should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 1999 Opel Omega weights approximately 125 kg more than 2004 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Alfa Romeo 156 is four wheel drive (4WD), it will have significant more traction and grip than 1999 Opel Omega. In wet, icy, snow, or gravel driving conditions, 2004 Alfa Romeo 156 will offer significantly more control. 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, 1999 Opel Omega (459 Nm @ 4400 RPM) has 159 more torque (in Nm) than 2004 Alfa Romeo 156. (300 Nm @ 2000 RPM). This means 1999 Opel Omega will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156. 1999 Opel Omega has automatic transmission and 2004 Alfa Romeo 156 has manual transmission. 2004 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1999 Opel Omega will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Alfa Romeo 156 | 1999 Opel Omega | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Omega |
| Year Released | 2004 | 1999 |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 5663 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 148 HP | 311 HP |
| Engine RPM | 4000 RPM | 5600 RPM |
| Torque | 300 Nm | 459 Nm |
| Torque RPM | 2000 RPM | 4400 RPM |
| Engine Bore Size | 82 mm | 99 mm |
| Engine Stroke Size | 90.4 mm | 92 mm |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Vehicle Weight | 1525 kg | 1650 kg |
| Vehicle Width | 1750 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1460 mm |
| Wheelbase Size | 2600 mm | 2740 mm |
