2005 BMW 525 vs. 1971 Citroen SM
To start off, 2005 BMW 525 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 2,670 cc (6 cylinders), 1971 Citroen SM is equipped with a bigger engine. In terms of performance, 2005 BMW 525 (215 HP @ 6500 RPM) has 57 more horse power than 1971 Citroen SM. (158 HP @ 5500 RPM). In normal driving conditions, 2005 BMW 525 should accelerate faster than 1971 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 525 weights approximately 236 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 2005 BMW 525 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 BMW 525 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 BMW 525 (250 Nm @ 2750 RPM) has 15 more torque (in Nm) than 1971 Citroen SM. (235 Nm @ 4000 RPM). This means 2005 BMW 525 will have an easier job in driving up hills or pulling heavy equipment than 1971 Citroen SM. 2005 BMW 525 has automatic transmission and 1971 Citroen SM has manual transmission. 1971 Citroen SM will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW 525 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 BMW 525 | 1971 Citroen SM | |
| Make | BMW | Citroen |
| Model | 525 | SM |
| Year Released | 2005 | 1971 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 215 HP | 158 HP |
| Engine RPM | 6500 RPM | 5500 RPM |
| Torque | 250 Nm | 235 Nm |
| Torque RPM | 2750 RPM | 4000 RPM |
| Engine Bore Size | 82 mm | 87 mm |
| Engine Stroke Size | 78.8 mm | 75 mm |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1686 kg | 1450 kg |
| Vehicle Length | 4850 mm | 4900 mm |
| Vehicle Width | 1850 mm | 1850 mm |
| Vehicle Height | 1490 mm | 1330 mm |
| Wheelbase Size | 2890 mm | 2950 mm |
| Fuel Tank Capacity | 70 L | 89 L |
