2005 Opel Astra vs. 2008 BMW Z4
To start off, 2008 BMW Z4 is newer by 3 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 2,996 cc (6 cylinders), 2008 BMW Z4 is equipped with a bigger engine. In terms of performance, 2008 BMW Z4 (261 HP @ 6600 RPM) has 147 more horse power than 2005 Opel Astra. (114 HP @ 5400 RPM) In normal driving conditions, 2008 BMW Z4 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW Z4 weights approximately 210 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 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, 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, 2008 BMW Z4 (316 Nm @ 2750 RPM) has 143 more torque (in Nm) than 2005 Opel Astra. (173 Nm @ 3400 RPM). This means 2008 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra. 2008 BMW Z4 has automatic transmission and 2005 Opel Astra has manual transmission. 2005 Opel Astra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Opel Astra | 2008 BMW Z4 | |
| Make | Opel | BMW |
| Model | Astra | Z4 |
| Year Released | 2005 | 2008 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1796 cc | 2996 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 114 HP | 261 HP |
| Engine RPM | 5400 RPM | 6600 RPM |
| Torque | 173 Nm | 316 Nm |
| Torque RPM | 3400 RPM | 2750 RPM |
| Engine Bore Size | 80.6 mm | 85 mm |
| Engine Stroke Size | 88.2 mm | 88 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1185 kg | 1395 kg |
| Vehicle Length | 4260 mm | 4100 mm |
| Vehicle Width | 1720 mm | 1790 mm |
| Vehicle Height | 1400 mm | 1270 mm |
| Wheelbase Size | 2610 mm | 2500 mm |
| Fuel Tank Capacity | 52 L | 55 L |
