1971 Riley 4 vs. 1951 Singer SM 1500
To start off, 1971 Riley 4 is newer by 20 year(s). Which means there will be less support and parts availability for 1951 Singer SM 1500. In addition, the cost of maintenance, including insurance, on 1951 Singer SM 1500 would be higher. At 1,622 cc (4 cylinders), 1971 Riley 4 is equipped with a bigger engine. In terms of performance, 1971 Riley 4 (67 HP @ 5000 RPM) has 20 more horse power than 1951 Singer SM 1500. (47 HP @ 4200 RPM). In normal driving conditions, 1971 Riley 4 should accelerate faster than 1951 Singer SM 1500. With that said, vehicle weight also plays an important factor in acceleration. 1971 Riley 4 weights approximately 308 kg more than 1951 Singer SM 1500. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front 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, 1971 Riley 4 (121 Nm @ 2500 RPM) has 23 more torque (in Nm) than 1951 Singer SM 1500. (98 Nm @ 2200 RPM). This means 1971 Riley 4 will have an easier job in driving up hills or pulling heavy equipment than 1951 Singer SM 1500.
Compare all specifications:
| 1971 Riley 4 | 1951 Singer SM 1500 | |
| Make | Riley | Singer |
| Model | 4 | SM 1500 |
| Year Released | 1971 | 1951 |
| Engine Position | Front | Front |
| Engine Size | 1622 cc | 1495 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 67 HP | 47 HP |
| Engine RPM | 5000 RPM | 4200 RPM |
| Torque | 121 Nm | 98 Nm |
| Torque RPM | 2500 RPM | 2200 RPM |
| Engine Bore Size | 76.3 mm | 73 mm |
| Engine Stroke Size | 88.9 mm | 89.4 mm |
| Engine Compression Ratio | 8.3:1 | 7.0:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1148 kg | 840 kg |
| Vehicle Length | 4540 mm | 3860 mm |
| Vehicle Width | 1620 mm | 1480 mm |
| Vehicle Height | 1510 mm | 1240 mm |
| Wheelbase Size | 2530 mm | 2320 mm |
