1971 Citroen SM vs. 1971 Renault 15
To start off, both 1971 Citroen SM and 1971 Renault 15 were released in the same year (1971). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,670 cc (6 cylinders), 1971 Citroen SM is equipped with a bigger engine. In terms of performance, 1971 Citroen SM (158 HP @ 5500 RPM) has 69 more horse power than 1971 Renault 15. (89 HP @ 5500 RPM). In normal driving conditions, 1971 Citroen SM should accelerate faster than 1971 Renault 15. With that said, vehicle weight also plays an important factor in acceleration. 1971 Citroen SM weights approximately 430 kg more than 1971 Renault 15. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1971 Citroen SM (235 Nm @ 4000 RPM) has 110 more torque (in Nm) than 1971 Renault 15. (125 Nm @ 3000 RPM). This means 1971 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1971 Renault 15.
Compare all specifications:
| 1971 Citroen SM | 1971 Renault 15 | |
| Make | Citroen | Renault |
| Model | SM | 15 |
| Year Released | 1971 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1565 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 158 HP | 89 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 235 Nm | 125 Nm |
| Torque RPM | 4000 RPM | 3000 RPM |
| Engine Bore Size | 87 mm | 77 mm |
| Engine Stroke Size | 75 mm | 84 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 3 doors |
| Vehicle Weight | 1450 kg | 1020 kg |
| Vehicle Length | 4900 mm | 4260 mm |
| Vehicle Width | 1850 mm | 1640 mm |
| Vehicle Height | 1330 mm | 1320 mm |
| Wheelbase Size | 2950 mm | 2440 mm |
| Fuel Tank Capacity | 89 L | 38 L |
