1971 Citroen SM vs. 2010 Audi S4
To start off, 2010 Audi S4 is newer by 39 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 3,000 cc (6 cylinders), 2010 Audi S4 is equipped with a bigger engine. In terms of performance, 2010 Audi S4 (333 HP @ 5500 RPM) has 175 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM) In normal driving conditions, 2010 Audi S4 should accelerate faster than 1971 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2010 Audi S4 weights approximately 295 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 2010 Audi S4 is all wheel drive (AWD), it will have significant more traction and grip than 1971 Citroen SM. In wet, icy, snow, or gravel driving conditions, 2010 Audi S4 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, 2010 Audi S4 (440 Nm @ 2900 RPM) has 205 more torque (in Nm) than 1971 Citroen SM. (235 Nm @ 4000 RPM). This means 2010 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM.
Compare all specifications:
| 1971 Citroen SM | 2010 Audi S4 | |
| Make | Citroen | Audi |
| Model | SM | S4 |
| Year Released | 1971 | 2010 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 3000 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 158 HP | 333 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 235 Nm | 440 Nm |
| Torque RPM | 4000 RPM | 2900 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | AWD |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1450 kg | 1745 kg |
| Vehicle Length | 4900 mm | 4704 mm |
| Vehicle Width | 1850 mm | 1826 mm |
| Vehicle Height | 1330 mm | 1427 mm |
| Wheelbase Size | 2950 mm | 2809 mm |
| Fuel Tank Capacity | 89 L | 64 L |
