1981 Alpina B 10 vs. 2003 BMW 645
To start off, 2003 BMW 645 is newer by 22 year(s). Which means there will be less support and parts availability for 1981 Alpina B 10. In addition, the cost of maintenance, including insurance, on 1981 Alpina B 10 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 190 kg more than 1981 Alpina B 10.
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 Alpina B 10 (469 Nm) has 19 more torque (in Nm) than 2003 BMW 645. (450 Nm). This means 1981 Alpina B 10 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 1981 Alpina B 10 | 2003 BMW 645 | |
| Make | Alpina | BMW |
| Model | B 10 | 645 |
| Year Released | 1981 | 2003 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3500 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 0 HP | 325 HP |
| Torque | 469 Nm | 450 Nm |
| Top Speed | 251 km/hour | 250 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1500 kg | 1690 kg |
| Vehicle Length | 5020 mm | 4830 mm |
| Wheelbase Size | 2840 mm | 2890 mm |
