1988 BMW 525 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 17 year(s). Which means there will be less support and parts availability for 1988 BMW 525. In addition, the cost of maintenance, including insurance, on 1988 BMW 525 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (326 HP @ 6100 RPM) has 158 more horse power than 1988 BMW 525. (168 HP @ 5800 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 1988 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 435 kg more than 1988 BMW 525. 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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 221 more torque (in Nm) than 1988 BMW 525. (226 Nm @ 4000 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1988 BMW 525.
Compare all specifications:
| 1988 BMW 525 | 2005 BMW 645 | |
| Make | BMW | BMW |
| Model | 525 | 645 |
| Year Released | 1988 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2443 cc | 4392 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 326 HP |
| Engine RPM | 5800 RPM | 6100 RPM |
| Torque | 226 Nm | 447 Nm |
| Torque RPM | 4000 RPM | 3600 RPM |
| Engine Bore Size | 82.1 mm | 92 mm |
| Engine Stroke Size | 78.8 mm | 83 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1460 kg | 1895 kg |
| Vehicle Length | 4730 mm | 4830 mm |
| Vehicle Width | 1760 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2770 mm | 2890 mm |
| Fuel Tank Capacity | 70 L | 70 L |
