1991 BMW 730 vs. 2003 Opel Astra
To start off, 2003 Opel Astra is newer by 12 year(s). Which means there will be less support and parts availability for 1991 BMW 730. In addition, the cost of maintenance, including insurance, on 1991 BMW 730 would be higher. At 2,986 cc (6 cylinders), 1991 BMW 730 is equipped with a bigger engine. In terms of performance, 1991 BMW 730 (185 HP @ 5800 RPM) has 111 more horse power than 2003 Opel Astra. (74 HP @ 5200 RPM). In normal driving conditions, 1991 BMW 730 should accelerate faster than 2003 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW 730 weights approximately 500 kg more than 2003 Opel Astra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1991 BMW 730 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 730. 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, 1991 BMW 730 (260 Nm @ 4000 RPM) has 130 more torque (in Nm) than 2003 Opel Astra. (130 Nm @ 2800 RPM). This means 1991 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 2003 Opel Astra.
Compare all specifications:
| 1991 BMW 730 | 2003 Opel Astra | |
| Make | BMW | Opel |
| Model | 730 | Astra |
| Year Released | 1991 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 2986 cc | 1596 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 185 HP | 74 HP |
| Engine RPM | 5800 RPM | 5200 RPM |
| Torque | 260 Nm | 130 Nm |
| Torque RPM | 4000 RPM | 2800 RPM |
| Engine Bore Size | 89 mm | 85 mm |
| Engine Stroke Size | 80 mm | 69.8 mm |
| Engine Compression Ratio | 9.0:1 | 9.6:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1600 kg | 1100 kg |
| Vehicle Length | 4920 mm | 4260 mm |
| Vehicle Width | 1850 mm | 1760 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2840 mm | 2640 mm |
| Fuel Tank Capacity | 90 L | 52 L |
