2009 Citroen C6 vs. 1999 Opel Signum
To start off, 2009 Citroen C6 is newer by 10 year(s). Which means there will be less support and parts availability for 1999 Opel Signum. In addition, the cost of maintenance, including insurance, on 1999 Opel Signum would be higher. At 3,175 cc (6 cylinders), 1999 Opel Signum is equipped with a bigger engine. In terms of performance, 1999 Opel Signum (208 HP @ 6200 RPM) has 40 more horse power than 2009 Citroen C6. (168 HP @ 4000 RPM) In normal driving conditions, 1999 Opel Signum should accelerate faster than 2009 Citroen C6. With that said, vehicle weight also plays an important factor in acceleration. 2009 Citroen C6 weights approximately 285 kg more than 1999 Opel Signum.
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, 2009 Citroen C6 (370 Nm @ 1500 RPM) has 70 more torque (in Nm) than 1999 Opel Signum. (300 Nm @ 4000 RPM). This means 2009 Citroen C6 will have an easier job in driving up hills or pulling heavy equipment than 1999 Opel Signum.
Compare all specifications:
| 2009 Citroen C6 | 1999 Opel Signum | |
| Make | Citroen | Opel |
| Model | C6 | Signum |
| Year Released | 2009 | 1999 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2179 cc | 3175 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 208 HP |
| Engine RPM | 4000 RPM | 6200 RPM |
| Torque | 370 Nm | 300 Nm |
| Torque RPM | 1500 RPM | 4000 RPM |
| Engine Bore Size | 85 mm | 87.5 mm |
| Engine Stroke Size | 96 mm | 88 mm |
| Engine Compression Ratio | 18.0:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 217 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 | 1895 kg | 1610 kg |
| Vehicle Length | 4910 mm | 4640 mm |
| Vehicle Width | 1870 mm | 1800 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2910 mm | 2840 mm |
| Fuel Tank Capacity | 72 L | 52 L |
