2004 Opel Signum vs. 2011 BMW Z4
To start off, 2011 BMW Z4 is newer by 7 year(s). Which means there will be less support and parts availability for 2004 Opel Signum. In addition, the cost of maintenance, including insurance, on 2004 Opel Signum would be higher. At 1,997 cc (4 cylinders), 2011 BMW Z4 is equipped with a bigger engine. In terms of performance, 2011 BMW Z4 (182 HP @ 5000 RPM) has 9 more horse power than 2004 Opel Signum. (173 HP @ 5500 RPM) In normal driving conditions, 2011 BMW Z4 should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 80 kg more than 2011 BMW Z4.
Because 2011 BMW Z4 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 2011 BMW Z4. 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, 2011 BMW Z4 (270 Nm @ 1250 RPM) has 5 more torque (in Nm) than 2004 Opel Signum. (265 Nm @ 2500 RPM). This means 2011 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum.
Compare all specifications:
| 2004 Opel Signum | 2011 BMW Z4 | |
| Make | Opel | BMW |
| Model | Signum | Z4 |
| Year Released | 2004 | 2011 |
| Body Type | Hatchback | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 1997 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 182 HP |
| Engine RPM | 5500 RPM | 5000 RPM |
| Torque | 265 Nm | 270 Nm |
| Torque RPM | 2500 RPM | 1250 RPM |
| Engine Bore Size | 86 mm | 90.1 mm |
| Engine Stroke Size | 86 mm | 84 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 220 km/hour | 235 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 | 1480 kg |
| Vehicle Length | 4640 mm | 4239 mm |
| Vehicle Width | 1800 mm | 1791 mm |
| Vehicle Height | 1470 mm | 1290 mm |
| Wheelbase Size | 2840 mm | 2497 mm |
| Fuel Consumption Overall | 9.4 L/100km | 6.8 L/100km |
| Fuel Tank Capacity | 60 L | 55 L |
