2005 Audi A4 vs. 1972 Citroen SM
To start off, 2005 Audi A4 is newer by 33 year(s). Which means there will be less support and parts availability for 1972 Citroen SM. In addition, the cost of maintenance, including insurance, on 1972 Citroen SM would be higher. At 2,976 cc (6 cylinders), 2005 Audi A4 is equipped with a bigger engine. In terms of performance, 2005 Audi A4 (217 HP @ 4000 RPM) has 44 more horse power than 1972 Citroen SM. (173 HP @ 5500 RPM). In normal driving conditions, 2005 Audi A4 should accelerate faster than 1972 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A4 weights approximately 248 kg more than 1972 Citroen SM. 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 A4 (300 Nm) has 63 more torque (in Nm) than 1972 Citroen SM. (237 Nm). This means 2005 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1972 Citroen SM.
Compare all specifications:
| 2005 Audi A4 | 1972 Citroen SM | |
| Make | Audi | Citroen |
| Model | A4 | SM |
| Year Released | 2005 | 1972 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2976 cc | 2669 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 217 HP | 173 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 300 Nm | 237 Nm |
| Engine Bore Size | 83 mm | 87 mm |
| Engine Stroke Size | 93 mm | 75 mm |
| Engine Compression Ratio | 10.1:1 | 9.0:1 |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1698 kg | 1450 kg |
| Vehicle Length | 4580 mm | 4900 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1330 mm |
| Wheelbase Size | 2660 mm | 2960 mm |
| Fuel Tank Capacity | 70 L | 25 L |
