2006 BMW 645 vs. 2005 Opel Vectra
To start off, 2006 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Opel Vectra. In addition, the cost of maintenance, including insurance, on 2005 Opel Vectra would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 158 more horse power than 2005 Opel Vectra. (170 HP @ 5500 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2005 Opel Vectra. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 340 kg more than 2005 Opel Vectra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 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 2006 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2005 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 185 more torque (in Nm) than 2005 Opel Vectra. (265 Nm @ 2500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Vectra. 2006 BMW 645 has automatic transmission and 2005 Opel Vectra has manual transmission. 2005 Opel Vectra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 645 | 2005 Opel Vectra | |
| Make | BMW | Opel |
| Model | 645 | Vectra |
| Year Released | 2006 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1997 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 170 HP |
| Engine RPM | 6100 RPM | 5500 RPM |
| Torque | 450 Nm | 265 Nm |
| Torque RPM | 3600 RPM | 2500 RPM |
| Engine Compression Ratio | 10.0:1 | 9.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 230 km/hour |
| Acceleration 0-100mph | 5.6 seconds | 9.1 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1810 kg | 1470 kg |
| Vehicle Length | 4830 mm | 4600 mm |
| Vehicle Width | 1860 mm | 1800 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2720 mm |
| Fuel Consumption Overall | 13.3 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 70 L | 61 L |
