1981 BMW 628 vs. 1978 BMW B7
To start off, 1981 BMW 628 is newer by 3 year(s). Which means there will be less support and parts availability for 1978 BMW B7. In addition, the cost of maintenance, including insurance, on 1978 BMW B7 would be higher. At 3,500 cc (6 cylinders), 1978 BMW B7 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 1978 BMW B7 weights approximately 30 kg more than 1981 BMW 628.
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, 1978 BMW B7 (627 Nm) has 387 more torque (in Nm) than 1981 BMW 628. (240 Nm). This means 1978 BMW B7 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 628.
Compare all specifications:
| 1981 BMW 628 | 1978 BMW B7 | |
| Make | BMW | BMW |
| Model | 628 | B7 |
| Year Released | 1981 | 1978 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2788 cc | 3500 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 181 HP | 0 HP |
| Torque | 240 Nm | 627 Nm |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Vehicle Weight | 1470 kg | 1500 kg |
| Wheelbase Size | 2640 mm | 2800 mm |
| Fuel Tank Capacity | 70 L | 70 L |
