1980 Alfa Romeo Spider vs. 1981 BMW 745
To start off, 1981 BMW 745 is newer by 1 year(s). Which means there will be less support and parts availability for 1980 Alfa Romeo Spider. In addition, the cost of maintenance, including insurance, on 1980 Alfa Romeo Spider 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 147 more horse power than 1980 Alfa Romeo Spider. (105 HP @ 5500 RPM) In normal driving conditions, 1981 BMW 745 should accelerate faster than 1980 Alfa Romeo Spider. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 590 kg more than 1980 Alfa Romeo Spider. 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 231 more torque (in Nm) than 1980 Alfa Romeo Spider. (149 Nm @ 4000 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 1980 Alfa Romeo Spider.
Compare all specifications:
| 1980 Alfa Romeo Spider | 1981 BMW 745 | |
| Make | Alfa Romeo | BMW |
| Model | Spider | 745 |
| Year Released | 1980 | 1981 |
| Body Type | Roadster | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1570 cc | 3430 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 105 HP | 252 HP |
| Engine RPM | 5500 RPM | 5200 RPM |
| Torque | 149 Nm | 380 Nm |
| Torque RPM | 4000 RPM | 2200 RPM |
| Engine Bore Size | 78 mm | 92 mm |
| Engine Stroke Size | 82 mm | 86 mm |
| Engine Compression Ratio | 9.0:1 | 8.0:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1000 kg | 1590 kg |
| Vehicle Length | 4130 mm | 4870 mm |
| Vehicle Width | 1640 mm | 1810 mm |
| Vehicle Height | 1300 mm | 1440 mm |
| Wheelbase Size | 2260 mm | 2800 mm |
