2009 BMW Z4 vs. 2005 Opel Astra
To start off, 2009 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Opel Astra. In addition, the cost of maintenance, including insurance, on 2005 Opel Astra would be higher. At 3,244 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (338 HP @ 7900 RPM) has 141 more horse power than 2005 Opel Astra. (197 HP @ 5600 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 weights approximately 105 kg more than 2005 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 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 2009 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2005 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 BMW Z4 (365 Nm @ 4900 RPM) has 115 more torque (in Nm) than 2005 Opel Astra. (250 Nm @ 1950 RPM). This means 2009 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra.
Compare all specifications:
| 2009 BMW Z4 | 2005 Opel Astra | |
| Make | BMW | Opel |
| Model | Z4 | Astra |
| Year Released | 2009 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 3244 cc | 1996 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 197 HP |
| Engine RPM | 7900 RPM | 5600 RPM |
| Torque | 365 Nm | 250 Nm |
| Torque RPM | 4900 RPM | 1950 RPM |
| Engine Bore Size | 87 mm | 86 mm |
| Engine Stroke Size | 91 mm | 86 mm |
| Engine Compression Ratio | 11.5:1 | 8.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 5 seconds | 7.5 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1495 kg | 1390 kg |
| Vehicle Length | 4120 mm | 4270 mm |
| Vehicle Width | 1790 mm | 1720 mm |
| Vehicle Height | 1290 mm | 1400 mm |
| Wheelbase Size | 2500 mm | 2620 mm |
| Fuel Consumption Overall | 12.1 L/100km | 8.8 L/100km |
| Fuel Tank Capacity | 60 L | 52 L |
