1973 BMW 525 vs. 2009 BMW 135
To start off, 2009 BMW 135 is newer by 36 year(s). Which means there will be less support and parts availability for 1973 BMW 525. In addition, the cost of maintenance, including insurance, on 1973 BMW 525 would be higher. At 2,977 cc (6 cylinders), 2009 BMW 135 is equipped with a bigger engine. In terms of performance, 2009 BMW 135 (302 HP @ 6000 RPM) has 159 more horse power than 1973 BMW 525. (143 HP @ 6000 RPM) In normal driving conditions, 2009 BMW 135 should accelerate faster than 1973 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 1973 BMW 525 weights approximately 60 kg more than 2009 BMW 135.
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, 2009 BMW 135 (400 Nm @ 1300 RPM) has 192 more torque (in Nm) than 1973 BMW 525. (208 Nm @ 4000 RPM). This means 2009 BMW 135 will have an easier job in driving up hills or pulling heavy equipment than 1973 BMW 525.
Compare all specifications:
| 1973 BMW 525 | 2009 BMW 135 | |
| Make | BMW | BMW |
| Model | 525 | 135 |
| Year Released | 1973 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 2977 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 143 HP | 302 HP |
| Engine RPM | 6000 RPM | 6000 RPM |
| Torque | 208 Nm | 400 Nm |
| Torque RPM | 4000 RPM | 1300 RPM |
| Engine Compression Ratio | 9.0:1 | 10.2:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 192 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.5 seconds | 5.3 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 3 doors |
| Vehicle Weight | 1380 kg | 1320 kg |
| Vehicle Length | 4630 mm | 4370 mm |
| Vehicle Width | 1700 mm | 1410 mm |
| Vehicle Height | 1430 mm | 1760 mm |
| Wheelbase Size | 2640 mm | 2670 mm |
| Fuel Tank Capacity | 70 L | 53 L |
