2003 Alfa Romeo Spider vs. 2006 Opel Signum
To start off, 2006 Opel Signum is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo Spider. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo Spider would be higher. At 3,179 cc (6 cylinders), 2003 Alfa Romeo Spider is equipped with a bigger engine. In terms of performance, 2003 Alfa Romeo Spider (248 HP @ 6300 RPM) has 73 more horse power than 2006 Opel Signum. (175 HP @ 4000 RPM). In normal driving conditions, 2003 Alfa Romeo Spider should accelerate faster than 2006 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 180 kg more than 2003 Alfa Romeo Spider.
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 65 more torque (in Nm) than 2003 Alfa Romeo Spider. (305 Nm @ 4800 RPM). This means 2006 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo Spider. 2006 Opel Signum has automatic transmission and 2003 Alfa Romeo Spider has manual transmission. 2003 Alfa Romeo Spider will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Alfa Romeo Spider | 2006 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | Spider | Signum |
| Year Released | 2003 | 2006 |
| Body Type | Roadster | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3179 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 248 HP | 175 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 305 Nm | 370 Nm |
| Torque RPM | 4800 RPM | 1900 RPM |
| Engine Bore Size | 93 mm | 87.5 mm |
| Engine Stroke Size | 78 mm | 82 mm |
| Engine Compression Ratio | 10.3:1 | 18.5:1 |
| Fuel Type | Gasoline | Diesel |
| Acceleration 0-100mph | 6.3 seconds | 9.4 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1490 kg | 1670 kg |
| Vehicle Length | 4310 mm | 4640 mm |
| Vehicle Width | 1780 mm | 1800 mm |
| Vehicle Height | 1330 mm | 1470 mm |
| Wheelbase Size | 2600 mm | 2840 mm |
| Fuel Consumption Overall | 13.2 L/100km | 7.6 L/100km |
| Fuel Tank Capacity | 70 L | 60 L |
