2005 Audi S4 vs. 1977 BMW 520
To start off, 2005 Audi S4 is newer by 28 year(s). Which means there will be less support and parts availability for 1977 BMW 520. In addition, the cost of maintenance, including insurance, on 1977 BMW 520 would be higher. At 4,161 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 206 more horse power than 1977 BMW 520. (134 HP @ 4000 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 1977 BMW 520. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 275 kg more than 1977 BMW 520. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi S4 (410 Nm) has 130 more torque (in Nm) than 1977 BMW 520. (280 Nm). This means 2005 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1977 BMW 520.
Compare all specifications:
| 2005 Audi S4 | 1977 BMW 520 | |
| Make | Audi | BMW |
| Model | S4 | 520 |
| Year Released | 2005 | 1977 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 1951 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 134 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 410 Nm | 280 Nm |
| Engine Bore Size | 85 mm | 84 mm |
| Engine Stroke Size | 93 mm | 88 mm |
| Engine Compression Ratio | 11.0:1 | 19.0:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1840 kg | 1565 kg |
| Vehicle Length | 4580 mm | 4780 mm |
| Vehicle Width | 1780 mm | 1810 mm |
| Vehicle Height | 1400 mm | 1440 mm |
| Wheelbase Size | 2660 mm | 2840 mm |
| Fuel Consumption Highway | 10.2 L/100km | 4.7 L/100km |
| Fuel Consumption City | 13.8 L/100km | 7.8 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 5.9 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
