2008 BMW Z4 vs. 2003 Opel Astra
To start off, 2008 BMW Z4 is newer by 5 year(s). Which means there will be less support and parts availability for 2003 Opel Astra. In addition, the cost of maintenance, including insurance, on 2003 Opel Astra would be higher. At 1,995 cc (4 cylinders), 2008 BMW Z4 is equipped with a bigger engine. In terms of performance, 2008 BMW Z4 (148 HP @ 6200 RPM) has 49 more horse power than 2003 Opel Astra. (99 HP @ 5600 RPM). In normal driving conditions, 2008 BMW Z4 should accelerate faster than 2003 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Astra weights approximately 55 kg more than 2008 BMW Z4.
Because 2008 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 2008 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2003 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 Z4 (200 Nm @ 3600 RPM) has 51 more torque (in Nm) than 2003 Opel Astra. (149 Nm @ 3600 RPM). This means 2008 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Astra.
Compare all specifications:
| 2008 BMW Z4 | 2003 Opel Astra | |
| Make | BMW | Opel |
| Model | Z4 | Astra |
| Year Released | 2008 | 2003 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 1598 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 99 HP |
| Engine RPM | 6200 RPM | 5600 RPM |
| Torque | 200 Nm | 149 Nm |
| Torque RPM | 3600 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 79 mm |
| Engine Stroke Size | 90 mm | 81.5 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1295 kg | 1350 kg |
| Vehicle Length | 4100 mm | 4280 mm |
| Vehicle Width | 1790 mm | 1720 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2500 mm | 2620 mm |
| Fuel Tank Capacity | 55 L | 52 L |
