2005 Opel Signum vs. 2008 Audi S4
To start off, 2008 Audi S4 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 4,163 cc (8 cylinders), 2008 Audi S4 is equipped with a bigger engine. In terms of performance, 2008 Audi S4 (339 HP @ 7000 RPM) has 166 more horse power than 2005 Opel Signum. (173 HP @ 5500 RPM) In normal driving conditions, 2008 Audi S4 should accelerate faster than 2005 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S4 weights approximately 235 kg more than 2005 Opel Signum. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Opel Signum. In wet, icy, snow, or gravel driving conditions, 2008 Audi S4 will offer significantly more control. 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 Audi S4 (410 Nm @ 3500 RPM) has 145 more torque (in Nm) than 2005 Opel Signum. (265 Nm @ 2500 RPM). This means 2008 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Signum. 2008 Audi S4 has automatic transmission and 2005 Opel Signum has manual transmission. 2005 Opel Signum will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi S4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Opel Signum | 2008 Audi S4 | |
| Make | Opel | Audi |
| Model | Signum | S4 |
| Year Released | 2005 | 2008 |
| Body Type | Hatchback | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 1908 cc | 4163 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 173 HP | 339 HP |
| Engine RPM | 5500 RPM | 7000 RPM |
| Torque | 265 Nm | 410 Nm |
| Torque RPM | 2500 RPM | 3500 RPM |
| Engine Bore Size | 86 mm | 84.5 mm |
| Engine Stroke Size | 86 mm | 92.8 mm |
| Engine Compression Ratio | 9.5:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 220 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 6.1 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1560 kg | 1795 kg |
| Vehicle Length | 4640 mm | 4580 mm |
| Vehicle Width | 1800 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1450 mm |
| Wheelbase Size | 2620 mm | 2660 mm |
| Fuel Consumption Overall | 9.2 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 60 L | 66 L |
