2006 BMW 730 vs. 2003 Opel Signum
To start off, 2006 BMW 730 is newer by 3 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 2,994 cc (6 cylinders), 2006 BMW 730 is equipped with a bigger engine. In terms of performance, 2006 BMW 730 (254 HP @ 6600 RPM) has 79 more horse power than 2003 Opel Signum. (175 HP @ 5500 RPM). In normal driving conditions, 2006 BMW 730 should accelerate faster than 2003 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 730 weights approximately 245 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 2006 BMW 730 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 2006 BMW 730. 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, 2003 Opel Signum (370 Nm @ 1900 RPM) has 70 more torque (in Nm) than 2006 BMW 730. (300 Nm @ 2500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 730.
Compare all specifications:
| 2006 BMW 730 | 2003 Opel Signum | |
| Make | BMW | Opel |
| Model | 730 | Signum |
| Year Released | 2006 | 2003 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2994 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 254 HP | 175 HP |
| Engine RPM | 6600 RPM | 5500 RPM |
| Torque | 300 Nm | 370 Nm |
| Torque RPM | 2500 RPM | 1900 RPM |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1820 kg | 1575 kg |
| Vehicle Length | 5180 mm | 4640 mm |
| Vehicle Width | 1910 mm | 1800 mm |
| Vehicle Height | 1500 mm | 1470 mm |
| Wheelbase Size | 3140 mm | 2840 mm |
