2008 BMW 645 vs. 2007 Opel Astra
To start off, 2008 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Opel Astra. In addition, the cost of maintenance, including insurance, on 2007 Opel Astra would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 206 more horse power than 2007 Opel Astra. (122 HP @ 5600 RPM). In normal driving conditions, 2008 BMW 645 should accelerate faster than 2007 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 645 weights approximately 424 kg more than 2007 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 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 2008 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2007 Opel Astra, 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 280 more torque (in Nm) than 2007 Opel Astra. (170 Nm @ 3800 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Opel Astra.
Compare all specifications:
| 2008 BMW 645 | 2007 Opel Astra | |
| Make | BMW | Opel |
| Model | 645 | Astra |
| Year Released | 2008 | 2007 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1796 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 122 HP |
| Engine RPM | 6100 RPM | 5600 RPM |
| Torque | 450 Nm | 170 Nm |
| Torque RPM | 3600 RPM | 3800 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 245 km/hour | 200 km/hour |
| Acceleration 0-100mph | 5.6 seconds | 10.7 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 3 doors |
| Vehicle Weight | 1690 kg | 1266 kg |
| Vehicle Width | 1860 mm | 1760 mm |
| Vehicle Height | 1380 mm | 1440 mm |
| Wheelbase Size | 2790 mm | 2620 mm |
| Fuel Consumption Overall | 11.7 L/100km | 7.7 L/100km |
| Fuel Tank Capacity | 70 L | 52 L |
