2005 AC Cobra vs. 2006 Opel Signum
To start off, 2006 Opel Signum is newer by 1 year(s). Which means there will be less support and parts availability for 2005 AC Cobra. In addition, the cost of maintenance, including insurance, on 2005 AC Cobra would be higher. At 3,506 cc (8 cylinders), 2005 AC Cobra is equipped with a bigger engine. In terms of performance, 2005 AC Cobra (350 HP @ 6500 RPM) has 230 more horse power than 2006 Opel Signum. (120 HP @ 6000 RPM). In normal driving conditions, 2005 AC Cobra should accelerate faster than 2006 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 Opel Signum weights approximately 418 kg more than 2005 AC Cobra.
Because 2005 AC Cobra is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2005 AC Cobra. However, in wet, icy, snow, or gravel driving conditions, 2006 Opel Signum, being front wheel drive (FWD), will offer much better control with better grip. 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 AC Cobra (400 Nm @ 4000 RPM) has 232 more torque (in Nm) than 2006 Opel Signum. (168 Nm @ 3800 RPM). This means 2005 AC Cobra will have an easier job in driving up hills or pulling heavy equipment than 2006 Opel Signum.
Compare all specifications:
| 2005 AC Cobra | 2006 Opel Signum | |
| Make | AC | Opel |
| Model | Cobra | Signum |
| Year Released | 2005 | 2006 |
| Body Type | Roadster | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 3506 cc | 1796 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 350 HP | 120 HP |
| Engine RPM | 6500 RPM | 6000 RPM |
| Torque | 400 Nm | 168 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 83 mm | 80.5 mm |
| Engine Stroke Size | 81 mm | 88.2 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1062 kg | 1480 kg |
| Vehicle Length | 4210 mm | 4640 mm |
| Vehicle Width | 1750 mm | 1800 mm |
| Vehicle Height | 1210 mm | 1470 mm |
| Wheelbase Size | 2300 mm | 2840 mm |
