2009 BMW 525 vs. 1981 BMW 628
To start off, 2009 BMW 525 is newer by 28 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 2,788 cc (6 cylinders), 1981 BMW 628 is equipped with a bigger engine. In terms of performance, 2009 BMW 525 (215 HP @ 6500 RPM) has 34 more horse power than 1981 BMW 628. (181 HP @ 6000 RPM). In normal driving conditions, 2009 BMW 525 should accelerate faster than 1981 BMW 628. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 525 weights approximately 55 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.
Because 2009 BMW 525 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 628. In wet, icy, snow, or gravel driving conditions, 2009 BMW 525 will offer significantly more control. 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, 2009 BMW 525 (250 Nm @ 2750 RPM) has 10 more torque (in Nm) than 1981 BMW 628. (240 Nm @ 4000 RPM). This means 2009 BMW 525 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 628.
Compare all specifications:
| 2009 BMW 525 | 1981 BMW 628 | |
| Make | BMW | BMW |
| Model | 525 | 628 |
| Year Released | 2009 | 1981 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2788 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 215 HP | 181 HP |
| Engine RPM | 6500 RPM | 6000 RPM |
| Torque | 250 Nm | 240 Nm |
| Torque RPM | 2750 RPM | 4000 RPM |
| Engine Bore Size | 78.9 mm | 86 mm |
| Engine Stroke Size | 82 mm | 80 mm |
| Engine Compression Ratio | 11.0:1 | 9.3:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1525 kg | 1470 kg |
| Vehicle Length | 4850 mm | 4760 mm |
| Vehicle Width | 1850 mm | 1730 mm |
| Vehicle Height | 1500 mm | 1370 mm |
| Wheelbase Size | 2840 mm | 2640 mm |
| Fuel Tank Capacity | 70 L | 70 L |
