2004 Audi A6 vs. 1972 Citroen SM
To start off, 2004 Audi A6 is newer by 32 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 3,189 cc (6 cylinders), 2004 Audi A6 is equipped with a bigger engine. In terms of performance, 2004 Audi A6 (247 HP @ 6500 RPM) has 74 more horse power than 1972 Citroen SM. (173 HP @ 5500 RPM). In normal driving conditions, 2004 Audi A6 should accelerate faster than 1972 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A6 weights approximately 230 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.
Because 2004 Audi A6 is four wheel drive (4WD), it will have significant more traction and grip than 1972 Citroen SM. In wet, icy, snow, or gravel driving conditions, 2004 Audi A6 will offer significantly more control. 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, 2004 Audi A6 (320 Nm @ 3250 RPM) has 83 more torque (in Nm) than 1972 Citroen SM. (237 Nm @ 4000 RPM). This means 2004 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1972 Citroen SM.
Compare all specifications:
| 2004 Audi A6 | 1972 Citroen SM | |
| Make | Audi | Citroen |
| Model | A6 | SM |
| Year Released | 2004 | 1972 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3189 cc | 2669 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 247 HP | 173 HP |
| Engine RPM | 6500 RPM | 5500 RPM |
| Torque | 320 Nm | 237 Nm |
| Torque RPM | 3250 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 87 mm |
| Engine Stroke Size | 92.8 mm | 75 mm |
| Engine Compression Ratio | 12.5:1 | 9.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1680 kg | 1450 kg |
| Vehicle Length | 4920 mm | 4900 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1470 mm | 1330 mm |
| Wheelbase Size | 2770 mm | 2960 mm |
| Fuel Tank Capacity | 80 L | 25 L |
