2007 BMW Z4 vs. 2009 Opel Astra
To start off, 2009 Opel Astra is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW Z4. In addition, the cost of maintenance, including insurance, on 2007 BMW Z4 would be higher. At 2,497 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 Opel Astra (239 HP @ 5600 RPM) has 24 more horse power than 2007 BMW Z4. (215 HP @ 6500 RPM) In normal driving conditions, 2009 Opel Astra should accelerate faster than 2007 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Opel Astra weights approximately 31 kg more than 2007 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 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 2007 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Opel Astra (320 Nm @ 2400 RPM) has 70 more torque (in Nm) than 2007 BMW Z4. (250 Nm @ 2750 RPM). This means 2009 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2007 BMW Z4 | 2009 Opel Astra | |
| Make | BMW | Opel |
| Model | Z4 | Astra |
| Year Released | 2007 | 2009 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 1998 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 239 HP |
| Engine RPM | 6500 RPM | 5600 RPM |
| Torque | 250 Nm | 320 Nm |
| Torque RPM | 2750 RPM | 2400 RPM |
| Engine Bore Size | 82 mm | 86 mm |
| Engine Stroke Size | 78.8 mm | 86 mm |
| Engine Compression Ratio | 11.0:1 | 8.8:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 240 km/hour | 244 km/hour |
| Acceleration 0-100mph | 6.5 seconds | 6.4 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 3 doors |
| Vehicle Weight | 1362 kg | 1393 kg |
| Vehicle Length | 4100 mm | 4300 mm |
| Vehicle Width | 1310 mm | 1760 mm |
| Vehicle Height | 1790 mm | 1410 mm |
| Wheelbase Size | 2500 mm | 2620 mm |
| Fuel Consumption Overall | 8.4 L/100km | 9.2 L/100km |
| Fuel Tank Capacity | 55 L | 52 L |
