1973 Citroen SM vs. 1972 McLaren M21
To start off, 1973 Citroen SM is newer by 1 year(s). Which means there will be less support and parts availability for 1972 McLaren M21. In addition, the cost of maintenance, including insurance, on 1972 McLaren M21 would be higher. At 2,670 cc (6 cylinders), 1973 Citroen SM is equipped with a bigger engine. In terms of performance, 1972 McLaren M21 (283 HP @ 9000 RPM) has 112 more horse power than 1973 Citroen SM. (171 HP @ 5500 RPM) In normal driving conditions, 1972 McLaren M21 should accelerate faster than 1973 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1973 Citroen SM weights approximately 985 kg more than 1972 McLaren M21.
Compare all specifications:
| 1973 Citroen SM | 1972 McLaren M21 | |
| Make | Citroen | McLaren |
| Model | SM | M21 |
| Year Released | 1973 | 1972 |
| Engine Size | 2670 cc | 1927 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 171 HP | 283 HP |
| Engine RPM | 5500 RPM | 9000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 1450 kg | 465 kg |
