2007 BMW Z4 vs. 2005 Opel Astra
To start off, 2007 BMW Z4 is newer by 2 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 2,497 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (215 HP @ 6500 RPM) has 70 more horse power than 2005 Opel Astra. (145 HP @ 5800 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Z4 weights approximately 64 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 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, 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, 2007 BMW Z4 (250 Nm @ 2750 RPM) has 47 more torque (in Nm) than 2005 Opel Astra. (203 Nm @ 4000 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra.
Compare all specifications:
| 2007 BMW Z4 | 2005 Opel Astra | |
| Make | BMW | Opel |
| Model | Z4 | Astra |
| Year Released | 2007 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2198 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 145 HP |
| Engine RPM | 6500 RPM | 5800 RPM |
| Torque | 250 Nm | 203 Nm |
| Torque RPM | 2750 RPM | 4000 RPM |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 240 km/hour | 213 km/hour |
| Acceleration 0-100mph | 6.5 seconds | 8.8 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 | 1362 kg | 1298 kg |
| Vehicle Length | 4100 mm | 4270 mm |
| Vehicle Width | 1310 mm | 1720 mm |
| Vehicle Height | 1790 mm | 1400 mm |
| Wheelbase Size | 2500 mm | 2620 mm |
| Fuel Consumption Overall | 8.4 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 55 L | 52 L |
