2008 Audi A4 vs. 2005 Opel Signum
To start off, 2008 Audi A4 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Opel Signum. In addition, the cost of maintenance, including insurance, on 2005 Opel Signum would be higher. At 1,993 cc (4 cylinders), 2005 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Audi A4 (161 HP @ 5700 RPM) has 62 more horse power than 2005 Opel Signum. (99 HP @ 3120 RPM). In normal driving conditions, 2008 Audi A4 should accelerate faster than 2005 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2005 Opel Signum weights approximately 55 kg more than 2008 Audi A4.
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, 2005 Opel Signum (230 Nm @ 1500 RPM) has 5 more torque (in Nm) than 2008 Audi A4. (225 Nm @ 1950 RPM). This means 2005 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A4.
Compare all specifications:
| 2008 Audi A4 | 2005 Opel Signum | |
| Make | Audi | Opel |
| Model | A4 | Signum |
| Year Released | 2008 | 2005 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1993 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 161 HP | 99 HP |
| Engine RPM | 5700 RPM | 3120 RPM |
| Torque | 225 Nm | 230 Nm |
| Torque RPM | 1950 RPM | 1500 RPM |
| Engine Bore Size | 81.1 mm | 84 mm |
| Engine Stroke Size | 86.4 mm | 90 mm |
| Engine Compression Ratio | 9.0:1 | 18.5:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Acceleration 0-100mph | 9.4 seconds | 14 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1540 kg | 1595 kg |
| Vehicle Length | 4580 mm | 4640 mm |
| Vehicle Width | 1780 mm | 1800 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2660 mm | 2740 mm |
| Fuel Consumption Overall | 8.5 L/100km | 5.9 L/100km |
| Fuel Tank Capacity | 70 L | 60 L |
