2004 Opel Vectra vs. 2007 BMW 645
To start off, 2007 BMW 645 is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2004 Opel Vectra would be higher. At 4,398 cc (8 cylinders), 2007 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 120 more horse power than 2004 Opel Vectra. (208 HP @ 6200 RPM) In normal driving conditions, 2007 BMW 645 should accelerate faster than 2004 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 645 weights approximately 65 kg more than 2004 Opel Vectra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW 645 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 2007 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2004 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, 2007 BMW 645 (450 Nm @ 3600 RPM) has 149 more torque (in Nm) than 2004 Opel Vectra. (301 Nm @ 4000 RPM). This means 2007 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Vectra.
Compare all specifications:
| 2004 Opel Vectra | 2007 BMW 645 | |
| Make | Opel | BMW |
| Model | Vectra | 645 |
| Year Released | 2004 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 3175 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 208 HP | 328 HP |
| Engine RPM | 6200 RPM | 6100 RPM |
| Torque | 301 Nm | 450 Nm |
| Torque RPM | 4000 RPM | 3600 RPM |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 239 km/hour | 245 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1625 kg | 1690 kg |
| Vehicle Length | 4830 mm | 4830 mm |
| Vehicle Width | 1800 mm | 1860 mm |
| Vehicle Height | 1510 mm | 1380 mm |
| Wheelbase Size | 2840 mm | 2790 mm |
| Fuel Consumption Overall | 10.1 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 60 L | 70 L |
