2003 BMW M3 vs. 2004 Opel Signum
To start off, 2004 Opel Signum is newer by 1 year(s). Which means there will be less support and parts availability for 2003 BMW M3. In addition, the cost of maintenance, including insurance, on 2003 BMW M3 would be higher. At 3,175 cc (6 cylinders), 2004 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 BMW M3 (240 HP @ 6000 RPM) has 32 more horse power than 2004 Opel Signum. (208 HP @ 6200 RPM). In normal driving conditions, 2003 BMW M3 should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 153 kg more than 2003 BMW M3.
Because 2003 BMW M3 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 2003 BMW M3. 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, both vehicles can yield 300 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2003 BMW M3 | 2004 Opel Signum | |
| Make | BMW | Opel |
| Model | M3 | Signum |
| Year Released | 2003 | 2004 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 3175 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 240 HP | 208 HP |
| Engine RPM | 6000 RPM | 6200 RPM |
| Torque | 300 Nm | 300 Nm |
| Torque RPM | 4250 RPM | 4000 RPM |
| Engine Bore Size | 86 mm | 87.5 mm |
| Engine Stroke Size | 85.8 mm | 88 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Top Speed | 220 km/hour | 237 km/hour |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1442 kg | 1595 kg |
| Vehicle Length | 4440 mm | 4640 mm |
| Vehicle Width | 1720 mm | 1800 mm |
| Vehicle Height | 1340 mm | 1470 mm |
| Wheelbase Size | 2730 mm | 2740 mm |
| Fuel Tank Capacity | 65 L | 52 L |
