1991 BMW Z1 vs. 2005 Opel Astra
To start off, 2005 Opel Astra is newer by 14 year(s). Which means there will be less support and parts availability for 1991 BMW Z1. In addition, the cost of maintenance, including insurance, on 1991 BMW Z1 would be higher. At 2,497 cc (6 cylinders), 1991 BMW Z1 is equipped with a bigger engine. In terms of performance, 1991 BMW Z1 (175 HP @ 5800 RPM) has 26 more horse power than 2005 Opel Astra. (149 HP @ 5800 RPM). In normal driving conditions, 1991 BMW Z1 should accelerate faster than 2005 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Opel Astra weights approximately 143 kg more than 1991 BMW Z1.
Because 1991 BMW Z1 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 1991 BMW Z1. 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, 1991 BMW Z1 (230 Nm @ 4000 RPM) has 27 more torque (in Nm) than 2005 Opel Astra. (203 Nm @ 4000 RPM). This means 1991 BMW Z1 will have an easier job in driving up hills or pulling heavy equipment than 2005 Opel Astra.
Compare all specifications:
| 1991 BMW Z1 | 2005 Opel Astra | |
| Make | BMW | Opel |
| Model | Z1 | Astra |
| Year Released | 1991 | 2005 |
| Body Type | Roadster | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2172 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 175 HP | 149 HP |
| Engine RPM | 5800 RPM | 5800 RPM |
| Torque | 230 Nm | 203 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 82 mm | 86 mm |
| Engine Stroke Size | 78.8 mm | 94.6 mm |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Front |
| Number of Seats | 2 seats | 4 seats |
| Vehicle Weight | 1250 kg | 1393 kg |
| Vehicle Length | 3960 mm | 4270 mm |
| Vehicle Width | 1810 mm | 1720 mm |
| Vehicle Height | 1280 mm | 1400 mm |
| Wheelbase Size | 2450 mm | 2710 mm |
