2002 BMW Z4 vs. 2005 Opel Astra
To start off, 2005 Opel Astra is newer by 3 year(s). Which means there will be less support and parts availability for 2002 BMW Z4. In addition, the cost of maintenance, including insurance, on 2002 BMW Z4 would be higher. At 2,494 cc (6 cylinders), 2002 BMW Z4 is equipped with a bigger engine. In terms of performance, 2002 BMW Z4 (193 HP @ 6000 RPM) has 109 more horse power than 2005 Opel Astra. (84 HP @ 5400 RPM). In normal driving conditions, 2002 BMW Z4 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2002 BMW Z4 weights approximately 159 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 2002 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 2002 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, 2002 BMW Z4 (245 Nm @ 3500 RPM) has 107 more torque (in Nm) than 2005 Opel Astra. (138 Nm @ 2600 RPM). This means 2002 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra.
Compare all specifications:
| 2002 BMW Z4 | 2005 Opel Astra | |
| Make | BMW | Opel |
| Model | Z4 | Astra |
| Year Released | 2002 | 2005 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 1598 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 193 HP | 84 HP |
| Engine RPM | 6000 RPM | 5400 RPM |
| Torque | 245 Nm | 138 Nm |
| Torque RPM | 3500 RPM | 2600 RPM |
| Engine Bore Size | 84 mm | 79 mm |
| Engine Stroke Size | 75 mm | 81.5 mm |
| Engine Compression Ratio | 10.5:1 | 9.6:1 |
| Top Speed | 227 km/hour | 177 km/hour |
| Acceleration 0-100mph | 7.8 seconds | 13.5 seconds |
| Drive Type | Rear | Front |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1365 kg | 1206 kg |
| Vehicle Length | 4100 mm | 4290 mm |
| Vehicle Width | 1790 mm | 1720 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2450 mm | 2620 mm |
| Fuel Consumption Overall | 9.5 L/100km | 7.9 L/100km |
| Fuel Tank Capacity | 55 L | 52 L |
