1999 BMW 730 vs. 2004 Opel Signum
To start off, 2004 Opel Signum is newer by 5 year(s). Which means there will be less support and parts availability for 1999 BMW 730. In addition, the cost of maintenance, including insurance, on 1999 BMW 730 would be higher. At 3,175 cc (6 cylinders), 2004 Opel Signum is equipped with a bigger engine. In terms of performance, 2004 Opel Signum (208 HP @ 6200 RPM) has 18 more horse power than 1999 BMW 730. (190 HP @ 5300 RPM) In normal driving conditions, 2004 Opel Signum should accelerate faster than 1999 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 1999 BMW 730 weights approximately 151 kg more than 2004 Opel Signum.
Because 1999 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 1999 BMW 730. However, in wet, icy, snow, or gravel driving conditions, 2004 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, 2004 Opel Signum (300 Nm @ 4000 RPM) has 20 more torque (in Nm) than 1999 BMW 730. (280 Nm @ 3950 RPM). This means 2004 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1999 BMW 730.
Compare all specifications:
| 1999 BMW 730 | 2004 Opel Signum | |
| Make | BMW | Opel |
| Model | 730 | Signum |
| Year Released | 1999 | 2004 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2793 cc | 3175 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 190 HP | 208 HP |
| Engine RPM | 5300 RPM | 6200 RPM |
| Torque | 280 Nm | 300 Nm |
| Torque RPM | 3950 RPM | 4000 RPM |
| Engine Bore Size | 84 mm | 87.5 mm |
| Engine Stroke Size | 84 mm | 88 mm |
| Engine Compression Ratio | 10.2:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1746 kg | 1595 kg |
| Vehicle Length | 5130 mm | 4640 mm |
| Vehicle Width | 1870 mm | 1800 mm |
| Vehicle Height | 1430 mm | 1470 mm |
| Wheelbase Size | 2940 mm | 2740 mm |
| Fuel Tank Capacity | 90 L | 52 L |
