1991 Audi 100 vs. 1971 Citroen SM
To start off, 1991 Audi 100 is newer by 20 year(s). Which means there will be less support and parts availability for 1971 Citroen SM. In addition, the cost of maintenance, including insurance, on 1971 Citroen SM would be higher. At 2,771 cc (6 cylinders), 1991 Audi 100 is equipped with a bigger engine. In terms of performance, 1991 Audi 100 (171 HP @ 5500 RPM) has 13 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM). In normal driving conditions, 1991 Audi 100 should accelerate faster than 1971 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1991 Audi 100 weights approximately 50 kg more than 1971 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1991 Audi 100 is four wheel drive (4WD), it will have significant more traction and grip than 1971 Citroen SM. In wet, icy, snow, or gravel driving conditions, 1991 Audi 100 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, 1991 Audi 100 (251 Nm @ 3000 RPM) has 16 more torque (in Nm) than 1971 Citroen SM. (235 Nm @ 4000 RPM). This means 1991 Audi 100 will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM.
Compare all specifications:
| 1991 Audi 100 | 1971 Citroen SM | |
| Make | Audi | Citroen |
| Model | 100 | SM |
| Year Released | 1991 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 2771 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 171 HP | 158 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 251 Nm | 235 Nm |
| Torque RPM | 3000 RPM | 4000 RPM |
| Engine Bore Size | 82.5 mm | 87 mm |
| Engine Stroke Size | 86.4 mm | 75 mm |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1500 kg | 1450 kg |
| Vehicle Length | 4800 mm | 4900 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1450 mm | 1330 mm |
| Wheelbase Size | 2690 mm | 2950 mm |
| Fuel Tank Capacity | 80 L | 89 L |
