1977 BMW 728 vs. 1976 BMW 630
To start off, 1977 BMW 728 is newer by 1 year(s). Which means there will be less support and parts availability for 1976 BMW 630. In addition, the cost of maintenance, including insurance, on 1976 BMW 630 would be higher. At 2,986 cc (6 cylinders), 1976 BMW 630 is equipped with a bigger engine. In terms of performance, 1976 BMW 630 (182 HP @ 5800 RPM) has 12 more horse power than 1977 BMW 728. (170 HP @ 6000 RPM) In normal driving conditions, 1976 BMW 630 should accelerate faster than 1977 BMW 728. With that said, vehicle weight also plays an important factor in acceleration. 1977 BMW 728 weights approximately 85 kg more than 1976 BMW 630.
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, 1976 BMW 630 (255 Nm @ 3500 RPM) has 20 more torque (in Nm) than 1977 BMW 728. (235 Nm @ 3700 RPM). This means 1976 BMW 630 will have an easier job in driving up hills or pulling heavy equipment than 1977 BMW 728.
Compare all specifications:
| 1977 BMW 728 | 1976 BMW 630 | |
| Make | BMW | BMW |
| Model | 728 | 630 |
| Year Released | 1977 | 1976 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2788 cc | 2986 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 170 HP | 182 HP |
| Engine RPM | 6000 RPM | 5800 RPM |
| Torque | 235 Nm | 255 Nm |
| Torque RPM | 3700 RPM | 3500 RPM |
| Engine Bore Size | 86 mm | 89 mm |
| Engine Stroke Size | 80 mm | 80 mm |
| Engine Compression Ratio | 9.0:1 | 9.0:1 |
| Top Speed | 193 km/hour | 211 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 | 1536 kg | 1451 kg |
| Vehicle Length | 4870 mm | 4760 mm |
| Vehicle Width | 1810 mm | 1760 mm |
| Vehicle Height | 1440 mm | 1390 mm |
| Wheelbase Size | 2800 mm | 2630 mm |
