2007 BMW 630 vs. 2003 Opel Signum
To start off, 2007 BMW 630 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Opel Signum. In addition, the cost of maintenance, including insurance, on 2003 Opel Signum would be higher. At 2,996 cc (6 cylinders), 2007 BMW 630 is equipped with a bigger engine. In terms of performance, 2007 BMW 630 (255 HP @ 6600 RPM) has 140 more horse power than 2003 Opel Signum. (115 HP @ 3000 RPM). In normal driving conditions, 2007 BMW 630 should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 630 weights approximately 225 kg more than 2003 Opel Signum. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW 630 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 2007 BMW 630. However, in wet, icy, snow, or gravel driving conditions, 2003 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, 2007 BMW 630 (300 Nm @ 2500 RPM) has 20 more torque (in Nm) than 2003 Opel Signum. (280 Nm @ 1500 RPM). This means 2007 BMW 630 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Signum.
Compare all specifications:
| 2007 BMW 630 | 2003 Opel Signum | |
| Make | BMW | Opel |
| Model | 630 | Signum |
| Year Released | 2007 | 2003 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 2172 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 255 HP | 115 HP |
| Engine RPM | 6600 RPM | 3000 RPM |
| Torque | 300 Nm | 280 Nm |
| Torque RPM | 2500 RPM | 1500 RPM |
| Engine Bore Size | 85 mm | 84.1 mm |
| Engine Stroke Size | 88 mm | 98 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1760 kg | 1535 kg |
| Vehicle Length | 4830 mm | 4640 mm |
| Vehicle Width | 1860 mm | 1800 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2840 mm |
