2005 BMW 730 vs. 1973 Citroen SM
To start off, 2005 BMW 730 is newer by 32 year(s). Which means there will be less support and parts availability for 1973 Citroen SM. In addition, the cost of maintenance, including insurance, on 1973 Citroen SM would be higher. At 2,979 cc (6 cylinders), 2005 BMW 730 is equipped with a bigger engine. In terms of performance, 2005 BMW 730 (225 HP @ 4000 RPM) has 54 more horse power than 1973 Citroen SM. (171 HP @ 5500 RPM). In normal driving conditions, 2005 BMW 730 should accelerate faster than 1973 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 730 weights approximately 525 kg more than 1973 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 BMW 730 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2005 BMW 730. However, in wet, icy, snow, or gravel driving conditions, 1973 Citroen SM, being front wheel drive (FWD), will offer much better control with better grip. 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 730 (500 Nm @ 2000 RPM) has 263 more torque (in Nm) than 1973 Citroen SM. (237 Nm @ 4000 RPM). This means 2005 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 1973 Citroen SM.
Compare all specifications:
| 2005 BMW 730 | 1973 Citroen SM | |
| Make | BMW | Citroen |
| Model | 730 | SM |
| Year Released | 2005 | 1973 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 2670 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 225 HP | 171 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 500 Nm | 237 Nm |
| Torque RPM | 2000 RPM | 4000 RPM |
| Engine Bore Size | 84.1 mm | 87 mm |
| Engine Stroke Size | 90 mm | 75 mm |
| Engine Compression Ratio | 18.0:1 | 9.0:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1975 kg | 1450 kg |
| Vehicle Length | 5050 mm | 4900 mm |
| Vehicle Width | 1910 mm | 1850 mm |
| Vehicle Height | 1500 mm | 1330 mm |
| Wheelbase Size | 2890 mm | 2960 mm |
| Fuel Tank Capacity | 88 L | 25 L |
