2006 Opel Signum vs. 2004 Alfa Romeo 166
To start off, 2006 Opel Signum is newer by 2 year(s). Which means there will be less support and parts availability for 2004 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2004 Alfa Romeo 166 would be higher. At 3,177 cc (6 cylinders), 2004 Alfa Romeo 166 is equipped with a bigger engine. In terms of performance, 2004 Alfa Romeo 166 (247 HP @ 6200 RPM) has 72 more horse power than 2006 Opel Signum. (175 HP @ 4000 RPM) In normal driving conditions, 2004 Alfa Romeo 166 should accelerate faster than 2006 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 130 kg more than 2004 Alfa Romeo 166.
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 Signum (370 Nm @ 1900 RPM) has 81 more torque (in Nm) than 2004 Alfa Romeo 166. (289 Nm @ 4800 RPM). This means 2006 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 166.
Compare all specifications:
| 2006 Opel Signum | 2004 Alfa Romeo 166 | |
| Make | Opel | Alfa Romeo |
| Model | Signum | 166 |
| Year Released | 2006 | 2004 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 3177 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 247 HP |
| Engine RPM | 4000 RPM | 6200 RPM |
| Torque | 370 Nm | 289 Nm |
| Torque RPM | 1900 RPM | 4800 RPM |
| Engine Bore Size | 87.5 mm | 93 mm |
| Engine Stroke Size | 82 mm | 78 mm |
| Engine Compression Ratio | 18.5:1 | 10.5:1 |
| Top Speed | 221 km/hour | 245 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 7.4 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1670 kg | 1540 kg |
| Vehicle Length | 4640 mm | 4730 mm |
| Vehicle Width | 1800 mm | 1810 mm |
| Vehicle Height | 1470 mm | 1420 mm |
| Wheelbase Size | 2840 mm | 2550 mm |
| Fuel Consumption Overall | 7.6 L/100km | 12.5 L/100km |
| Fuel Tank Capacity | 60 L | 69 L |
