2003 Opel Vectra vs. 2005 BMW Z4
To start off, 2005 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2003 Opel Vectra would be higher. At 2,957 cc (6 cylinders), 2003 Opel Vectra is equipped with a bigger engine. In terms of performance, 2005 BMW Z4 (184 HP @ 6100 RPM) has 11 more horse power than 2003 Opel Vectra. (173 HP @ 4000 RPM) In normal driving conditions, 2005 BMW Z4 should accelerate faster than 2003 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Vectra weights approximately 210 kg more than 2005 BMW Z4.
Because 2005 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 2005 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2003 Opel Vectra, 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, 2003 Opel Vectra (370 Nm @ 1900 RPM) has 133 more torque (in Nm) than 2005 BMW Z4. (237 Nm @ 3500 RPM). This means 2003 Opel Vectra will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW Z4. 2005 BMW Z4 has automatic transmission and 2003 Opel Vectra has manual transmission. 2003 Opel Vectra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Opel Vectra | 2005 BMW Z4 | |
| Make | Opel | BMW |
| Model | Vectra | Z4 |
| Year Released | 2003 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2957 cc | 2489 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 184 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 370 Nm | 237 Nm |
| Torque RPM | 1900 RPM | 3500 RPM |
| Engine Bore Size | 87.5 mm | 84 mm |
| Engine Stroke Size | 82 mm | 75 mm |
| Engine Compression Ratio | 18.5:1 | 10.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 226 km/hour | 235 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1605 kg | 1395 kg |
| Vehicle Length | 4600 mm | 4100 mm |
| Vehicle Width | 1770 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1310 mm |
| Wheelbase Size | 2740 mm | 2500 mm |
| Fuel Consumption Overall | 7 L/100km | 9 L/100km |
| Fuel Tank Capacity | 60 L | 55 L |
