1971 Citroen SM vs. 1963 Humber Sceptre
To start off, 1971 Citroen SM is newer by 8 year(s). Which means there will be less support and parts availability for 1963 Humber Sceptre. In addition, the cost of maintenance, including insurance, on 1963 Humber Sceptre would be higher. At 2,670 cc (6 cylinders), 1971 Citroen SM is equipped with a bigger engine. In terms of performance, 1971 Citroen SM (158 HP @ 5500 RPM) has 80 more horse power than 1963 Humber Sceptre. (78 HP @ 5000 RPM). In normal driving conditions, 1971 Citroen SM should accelerate faster than 1963 Humber Sceptre. With that said, vehicle weight also plays an important factor in acceleration. 1971 Citroen SM weights approximately 326 kg more than 1963 Humber Sceptre. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1963 Humber Sceptre 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 1963 Humber Sceptre. However, in wet, icy, snow, or gravel driving conditions, 1971 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, 1971 Citroen SM (235 Nm @ 4000 RPM) has 111 more torque (in Nm) than 1963 Humber Sceptre. (124 Nm @ 3500 RPM). This means 1971 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1963 Humber Sceptre.
Compare all specifications:
| 1971 Citroen SM | 1963 Humber Sceptre | |
| Make | Citroen | Humber |
| Model | SM | Sceptre |
| Year Released | 1971 | 1963 |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1592 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 158 HP | 78 HP |
| Engine RPM | 5500 RPM | 5000 RPM |
| Torque | 235 Nm | 124 Nm |
| Torque RPM | 4000 RPM | 3500 RPM |
| Engine Bore Size | 87 mm | 81.5 mm |
| Engine Stroke Size | 75 mm | 76.2 mm |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 1450 kg | 1124 kg |
| Vehicle Length | 4900 mm | 4210 mm |
| Vehicle Width | 1850 mm | 1610 mm |
| Vehicle Height | 1330 mm | 1450 mm |
| Wheelbase Size | 2950 mm | 2570 mm |
| Fuel Tank Capacity | 89 L | 47 L |
