1981 BMW 745 vs. 1998 Opel Speedster
To start off, 1998 Opel Speedster is newer by 17 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 107 more horse power than 1998 Opel Speedster. (145 HP @ 5800 RPM). In normal driving conditions, 1981 BMW 745 should accelerate faster than 1998 Opel Speedster. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 645 kg more than 1998 Opel Speedster. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 177 more torque (in Nm) than 1998 Opel Speedster. (203 Nm @ 4000 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 1998 Opel Speedster.
Compare all specifications:
| 1981 BMW 745 | 1998 Opel Speedster | |
| Make | BMW | Opel |
| Model | 745 | Speedster |
| Year Released | 1981 | 1998 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Middle |
| Engine Size | 3430 cc | 2198 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 252 HP | 145 HP |
| Engine RPM | 5200 RPM | 5800 RPM |
| Torque | 380 Nm | 203 Nm |
| Torque RPM | 2200 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 86 mm |
| Engine Stroke Size | 86 mm | 94.6 mm |
| Engine Compression Ratio | 8.0:1 | 10.0:1 |
| Top Speed | 220 km/hour | 217 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1590 kg | 945 kg |
| Vehicle Length | 4870 mm | 3790 mm |
| Vehicle Width | 1810 mm | 1710 mm |
| Vehicle Height | 1440 mm | 1120 mm |
| Wheelbase Size | 2800 mm | 2340 mm |
| Fuel Tank Capacity | 100 L | 60 L |
