2002 Alfa Romeo 166 vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 1 year(s). Which means there will be less support and parts availability for 2002 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2002 Alfa Romeo 166 would be higher. At 3,173 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (208 HP @ 6200 RPM) has 60 more horse power than 2002 Alfa Romeo 166. (148 HP @ 6500 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 2002 Alfa Romeo 166. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 115 kg more than 2002 Alfa Romeo 166. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2003 Opel Signum (300 Nm @ 4000 RPM) has 118 more torque (in Nm) than 2002 Alfa Romeo 166. (182 Nm @ 3800 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 166.
Compare all specifications:
| 2002 Alfa Romeo 166 | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 166 | Signum |
| Year Released | 2002 | 2003 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 3173 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 208 HP |
| Engine RPM | 6500 RPM | 6200 RPM |
| Torque | 182 Nm | 300 Nm |
| Torque RPM | 3800 RPM | 4000 RPM |
| Engine Bore Size | 83 mm | 87.5 mm |
| Engine Stroke Size | 91 mm | 88 mm |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 211 km/hour | 237 km/hour |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1495 kg | 1610 kg |
| Vehicle Length | 4730 mm | 4640 mm |
| Vehicle Width | 1810 mm | 1800 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2740 mm |
| Fuel Consumption Overall | 9.7 L/100km | 10.1 L/100km |
| Fuel Tank Capacity | 63 L | 52 L |
