1981 BMW 628 vs. 1997 BMW 730
To start off, 1997 BMW 730 is newer by 16 year(s). Which means there will be less support and parts availability for 1981 BMW 628. In addition, the cost of maintenance, including insurance, on 1981 BMW 628 would be higher. At 2,792 cc (6 cylinders), 1997 BMW 730 is equipped with a bigger engine. In terms of performance, 1997 BMW 730 (190 HP @ 5300 RPM) has 9 more horse power than 1981 BMW 628. (181 HP @ 6000 RPM) In normal driving conditions, 1997 BMW 730 should accelerate faster than 1981 BMW 628. With that said, vehicle weight also plays an important factor in acceleration. 1997 BMW 730 weights approximately 275 kg more than 1981 BMW 628. 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, 1997 BMW 730 (279 Nm @ 3950 RPM) has 39 more torque (in Nm) than 1981 BMW 628. (240 Nm @ 4000 RPM). This means 1997 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 628.
Compare all specifications:
| 1981 BMW 628 | 1997 BMW 730 | |
| Make | BMW | BMW |
| Model | 628 | 730 |
| Year Released | 1981 | 1997 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2788 cc | 2792 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 181 HP | 190 HP |
| Engine RPM | 6000 RPM | 5300 RPM |
| Torque | 240 Nm | 279 Nm |
| Torque RPM | 4000 RPM | 3950 RPM |
| Engine Bore Size | 86 mm | 84 mm |
| Engine Stroke Size | 80 mm | 84 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1470 kg | 1745 kg |
| Vehicle Length | 4760 mm | 5130 mm |
| Vehicle Width | 1730 mm | 1870 mm |
| Vehicle Height | 1370 mm | 1430 mm |
| Wheelbase Size | 2640 mm | 2940 mm |
| Fuel Tank Capacity | 70 L | 90 L |
