2004 Audi S4 vs. 1973 BMW 525
To start off, 2004 Audi S4 is newer by 31 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 4,163 cc (8 cylinders), 2004 Audi S4 is equipped with a bigger engine. In terms of performance, 2004 Audi S4 (340 HP @ 6200 RPM) has 197 more horse power than 1973 BMW 525. (143 HP @ 6000 RPM). In normal driving conditions, 2004 Audi S4 should accelerate faster than 1973 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi S4 weights approximately 515 kg more than 1973 BMW 525. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2004 Audi S4 (411 Nm) has 203 more torque (in Nm) than 1973 BMW 525. (208 Nm). This means 2004 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1973 BMW 525.
Compare all specifications:
| 2004 Audi S4 | 1973 BMW 525 | |
| Make | Audi | BMW |
| Model | S4 | 525 |
| Year Released | 2004 | 1973 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2494 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 340 HP | 143 HP |
| Engine RPM | 6200 RPM | 6000 RPM |
| Torque | 411 Nm | 208 Nm |
| Engine Bore Size | 85 mm | 86 mm |
| Engine Stroke Size | 93 mm | 71.6 mm |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1895 kg | 1380 kg |
| Vehicle Length | 4580 mm | 4630 mm |
| Vehicle Width | 1780 mm | 1700 mm |
| Vehicle Height | 1400 mm | 1430 mm |
| Wheelbase Size | 2770 mm | 2640 mm |
| Fuel Tank Capacity | 63 L | 70 L |
