2004 Buick Regal vs. 1971 Citroen SM
To start off, 2004 Buick Regal is newer by 33 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 3,791 cc (6 cylinders), 2004 Buick Regal is equipped with a bigger engine. In terms of performance, 2004 Buick Regal (201 HP @ 5200 RPM) has 43 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM). In normal driving conditions, 2004 Buick Regal should accelerate faster than 1971 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2004 Buick Regal weights approximately 100 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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, 2004 Buick Regal (305 Nm) has 70 more torque (in Nm) than 1971 Citroen SM. (235 Nm). This means 2004 Buick Regal will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM.
Compare all specifications:
| 2004 Buick Regal | 1971 Citroen SM | |
| Make | Buick | Citroen |
| Model | Regal | SM |
| Year Released | 2004 | 1971 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3791 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 201 HP | 158 HP |
| Engine RPM | 5200 RPM | 5500 RPM |
| Torque | 305 Nm | 235 Nm |
| Engine Bore Size | 97 mm | 87 mm |
| Engine Stroke Size | 86 mm | 75 mm |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1550 kg | 1450 kg |
| Vehicle Length | 4990 mm | 4900 mm |
| Vehicle Width | 1850 mm | 1850 mm |
| Vehicle Height | 1440 mm | 1330 mm |
| Wheelbase Size | 2780 mm | 2950 mm |
| Fuel Tank Capacity | 64 L | 89 L |
