2003 BMW 325 vs. 1956 BMW 503
To start off, 2003 BMW 325 is newer by 47 year(s). Which means there will be less support and parts availability for 1956 BMW 503. In addition, the cost of maintenance, including insurance, on 1956 BMW 503 would be higher. At 3,168 cc (8 cylinders), 1956 BMW 503 is equipped with a bigger engine. In terms of performance, 2003 BMW 325 (192 HP @ 6000 RPM) has 54 more horse power than 1956 BMW 503. (138 HP @ 4800 RPM). In normal driving conditions, 2003 BMW 325 should accelerate faster than 1956 BMW 503. With that said, vehicle weight also plays an important factor in acceleration. 1956 BMW 503 weights approximately 20 kg more than 2003 BMW 325.
Let's talk about torque, 2003 BMW 325 (245 Nm @ 3500 RPM) has 23 more torque (in Nm) than 1956 BMW 503. (222 Nm @ 2500 RPM). This means 2003 BMW 325 will have an easier job in driving up hills or pulling heavy equipment than 1956 BMW 503.
Compare all specifications:
| 2003 BMW 325 | 1956 BMW 503 | |
| Make | BMW | BMW |
| Model | 325 | 503 |
| Year Released | 2003 | 1956 |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 3168 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 192 HP | 138 HP |
| Engine RPM | 6000 RPM | 4800 RPM |
| Torque | 245 Nm | 222 Nm |
| Torque RPM | 3500 RPM | 2500 RPM |
| Engine Bore Size | 84.1 mm | 82 mm |
| Engine Stroke Size | 75 mm | 75 mm |
| Engine Compression Ratio | 10.5:1 | 7.3:1 |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 3 doors | 4 doors |
| Vehicle Weight | 1480 kg | 1500 kg |
| Vehicle Length | 4270 mm | 4760 mm |
| Vehicle Width | 1760 mm | 1710 mm |
| Vehicle Height | 1410 mm | 1400 mm |
| Wheelbase Size | 2730 mm | 2840 mm |
| Fuel Tank Capacity | 63 L | 75 L |
