2003 Alfa Romeo 156 vs. 2008 Opel Signum
To start off, 2008 Opel Signum is newer by 5 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 156 would be higher. At 3,175 cc (6 cylinders), 2008 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Opel Signum (208 HP @ 6200 RPM) has 46 more horse power than 2003 Alfa Romeo 156. (162 HP @ 6400 RPM) In normal driving conditions, 2008 Opel Signum should accelerate faster than 2003 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Signum weights approximately 325 kg more than 2003 Alfa Romeo 156. 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, 2008 Opel Signum (300 Nm @ 4000 RPM) has 94 more torque (in Nm) than 2003 Alfa Romeo 156. (206 Nm @ 3250 RPM). This means 2008 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo 156. 2008 Opel Signum has automatic transmission and 2003 Alfa Romeo 156 has manual transmission. 2003 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Alfa Romeo 156 | 2008 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | 156 | Signum |
| Year Released | 2003 | 2008 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1968 cc | 3175 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 162 HP | 208 HP |
| Engine RPM | 6400 RPM | 6200 RPM |
| Torque | 206 Nm | 300 Nm |
| Torque RPM | 3250 RPM | 4000 RPM |
| Engine Bore Size | 83 mm | 87.5 mm |
| Engine Stroke Size | 91 mm | 88 mm |
| Engine Compression Ratio | 11.3:1 | 10.0:1 |
| Top Speed | 220 km/hour | 237 km/hour |
| Acceleration 0-100mph | 8.2 seconds | 7.9 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1285 kg | 1610 kg |
| Vehicle Length | 4440 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2840 mm |
| Fuel Consumption Overall | 8.6 L/100km | 10.1 L/100km |
| Fuel Tank Capacity | 63 L | 60 L |
