2004 Opel Signum vs. 2002 BMW Z3
To start off, 2004 Opel Signum is newer by 2 year(s). Which means there will be less support and parts availability for 2002 BMW Z3. In addition, the cost of maintenance, including insurance, on 2002 BMW Z3 would be higher. At 2,171 cc (6 cylinders), 2002 BMW Z3 is equipped with a bigger engine. In terms of performance, 2004 Opel Signum (173 HP @ 5500 RPM) has 6 more horse power than 2002 BMW Z3. (167 HP @ 6100 RPM). In normal driving conditions, 2004 Opel Signum should accelerate faster than 2002 BMW Z3. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 215 kg more than 2002 BMW Z3. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2002 BMW Z3 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 2002 BMW Z3. 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 (265 Nm @ 2500 RPM) has 55 more torque (in Nm) than 2002 BMW Z3. (210 Nm @ 3500 RPM). This means 2004 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2002 BMW Z3.
Compare all specifications:
| 2004 Opel Signum | 2002 BMW Z3 | |
| Make | Opel | BMW |
| Model | Signum | Z3 |
| Year Released | 2004 | 2002 |
| Body Type | Hatchback | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 2171 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 173 HP | 167 HP |
| Engine RPM | 5500 RPM | 6100 RPM |
| Torque | 265 Nm | 210 Nm |
| Torque RPM | 2500 RPM | 3500 RPM |
| Engine Bore Size | 86 mm | 80 mm |
| Engine Stroke Size | 86 mm | 72 mm |
| Engine Compression Ratio | 9.5:1 | 10.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 220 km/hour | 224 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1560 kg | 1345 kg |
| Vehicle Length | 4640 mm | 4060 mm |
| Vehicle Width | 1800 mm | 1750 mm |
| Vehicle Height | 1470 mm | 1300 mm |
| Wheelbase Size | 2840 mm | 2450 mm |
| Fuel Tank Capacity | 60 L | 51 L |
