2003 BMW Z4 vs. 2001 Opel Signum
To start off, 2003 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2001 Opel Signum. In addition, the cost of maintenance, including insurance, on 2001 Opel Signum would be higher. At 2,999 cc (6 cylinders), 2003 BMW Z4 is equipped with a bigger engine. In terms of performance, 2003 BMW Z4 (227 HP @ 6000 RPM) has 52 more horse power than 2001 Opel Signum. (175 HP @ 4000 RPM). In normal driving conditions, 2003 BMW Z4 should accelerate faster than 2001 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2001 Opel Signum weights approximately 380 kg more than 2003 BMW Z4.
Because 2003 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 2003 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2001 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, 2001 Opel Signum (370 Nm @ 1900 RPM) has 79 more torque (in Nm) than 2003 BMW Z4. (291 Nm @ 3500 RPM). This means 2001 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW Z4. 2001 Opel Signum has automatic transmission and 2003 BMW Z4 has manual transmission. 2003 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2001 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW Z4 | 2001 Opel Signum | |
| Make | BMW | Opel |
| Model | Z4 | Signum |
| Year Released | 2003 | 2001 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2999 cc | 2958 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 227 HP | 175 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 291 Nm | 370 Nm |
| Torque RPM | 3500 RPM | 1900 RPM |
| Engine Bore Size | 84 mm | 87.5 mm |
| Engine Stroke Size | 90 mm | 82 mm |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1290 kg | 1670 kg |
| Vehicle Length | 4100 mm | 4640 mm |
| Vehicle Width | 1790 mm | 1800 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2500 mm | 2710 mm |
| Fuel Tank Capacity | 55 L | 60 L |
