2007 BMW 650 vs. 1974 Citroen SM
To start off, 2007 BMW 650 is newer by 33 year(s). Which means there will be less support and parts availability for 1974 Citroen SM. In addition, the cost of maintenance, including insurance, on 1974 Citroen SM would be higher. At 4,798 cc (8 cylinders), 2007 BMW 650 is equipped with a bigger engine. In terms of performance, 2007 BMW 650 (362 HP @ 6300 RPM) has 192 more horse power than 1974 Citroen SM. (170 HP @ 5500 RPM). In normal driving conditions, 2007 BMW 650 should accelerate faster than 1974 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 650 weights approximately 190 kg more than 1974 Citroen SM. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW 650 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 2007 BMW 650. However, in wet, icy, snow, or gravel driving conditions, 1974 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, 2007 BMW 650 (490 Nm @ 3400 RPM) has 253 more torque (in Nm) than 1974 Citroen SM. (237 Nm @ 4000 RPM). This means 2007 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 1974 Citroen SM.
Compare all specifications:
| 2007 BMW 650 | 1974 Citroen SM | |
| Make | BMW | Citroen |
| Model | 650 | SM |
| Year Released | 2007 | 1974 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4798 cc | 2670 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 362 HP | 170 HP |
| Engine RPM | 6300 RPM | 5500 RPM |
| Torque | 490 Nm | 237 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Engine Compression Ratio | 10.5:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1640 kg | 1450 kg |
| Vehicle Length | 4830 mm | 4900 mm |
| Vehicle Width | 1380 mm | 1850 mm |
| Vehicle Height | 1860 mm | 1330 mm |
| Wheelbase Size | 2790 mm | 2960 mm |
| Fuel Tank Capacity | 70 L | 25 L |
