1981 BMW 745 vs. 2004 Opel Astra
To start off, 2004 Opel Astra is newer by 23 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 3,430 cc (6 cylinders), 1981 BMW 745 is equipped with a bigger engine. In terms of performance, 1981 BMW 745 (252 HP @ 5200 RPM) has 167 more horse power than 2004 Opel Astra. (85 HP @ 5400 RPM). In normal driving conditions, 1981 BMW 745 should accelerate faster than 2004 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 281 kg more than 2004 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1981 BMW 745 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 1981 BMW 745. However, in wet, icy, snow, or gravel driving conditions, 2004 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, 1981 BMW 745 (380 Nm @ 2200 RPM) has 241 more torque (in Nm) than 2004 Opel Astra. (139 Nm @ 2600 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Astra.
Compare all specifications:
| 1981 BMW 745 | 2004 Opel Astra | |
| Make | BMW | Opel |
| Model | 745 | Astra |
| Year Released | 1981 | 2004 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 3430 cc | 1598 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 252 HP | 85 HP |
| Engine RPM | 5200 RPM | 5400 RPM |
| Torque | 380 Nm | 139 Nm |
| Torque RPM | 2200 RPM | 2600 RPM |
| Engine Bore Size | 92 mm | 79 mm |
| Engine Stroke Size | 86 mm | 81.5 mm |
| Top Speed | 227 km/hour | 157 km/hour |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1596 kg | 1315 kg |
| Vehicle Length | 4870 mm | 4290 mm |
| Vehicle Width | 1810 mm | 1720 mm |
| Vehicle Height | 1440 mm | 1470 mm |
| Wheelbase Size | 2770 mm | 2610 mm |
| Fuel Tank Capacity | 100 L | 52 L |
