1971 Citroen SM vs. 2005 Porsche 911
To start off, 2005 Porsche 911 is newer by 34 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 3,594 cc (6 cylinders), 2005 Porsche 911 is equipped with a bigger engine. In terms of performance, 2005 Porsche 911 (320 HP @ 6800 RPM) has 162 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM) In normal driving conditions, 2005 Porsche 911 should accelerate faster than 1971 Citroen SM.
Because 2005 Porsche 911 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, 2005 Porsche 911 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, 2005 Porsche 911 (370 Nm @ 4250 RPM) has 135 more torque (in Nm) than 1971 Citroen SM. (235 Nm @ 4000 RPM). This means 2005 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM.
Compare all specifications:
| 1971 Citroen SM | 2005 Porsche 911 | |
| Make | Citroen | Porsche |
| Model | SM | 911 |
| Year Released | 1971 | 2005 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2670 cc | 3594 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 158 HP | 320 HP |
| Engine RPM | 5500 RPM | 6800 RPM |
| Torque | 235 Nm | 370 Nm |
| Torque RPM | 4000 RPM | 4250 RPM |
| Engine Bore Size | 87 mm | 96 mm |
| Engine Stroke Size | 75 mm | 82.8 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1450 kg | 1450 kg |
| Vehicle Length | 4900 mm | 4430 mm |
| Vehicle Width | 1850 mm | 1860 mm |
| Vehicle Height | 1330 mm | 1320 mm |
| Wheelbase Size | 2950 mm | 2360 mm |
| Fuel Tank Capacity | 89 L | 64 L |
