1976 BMW 633 vs. 1970 Riley 4
To start off, 1976 BMW 633 is newer by 6 year(s). Which means there will be less support and parts availability for 1970 Riley 4. In addition, the cost of maintenance, including insurance, on 1970 Riley 4 would be higher. At 3,210 cc (6 cylinders), 1976 BMW 633 is equipped with a bigger engine. In terms of performance, 1976 BMW 633 (197 HP @ 5500 RPM) has 130 more horse power than 1970 Riley 4. (67 HP @ 5000 RPM). In normal driving conditions, 1976 BMW 633 should accelerate faster than 1970 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 1976 BMW 633 weights approximately 322 kg more than 1970 Riley 4. 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, 1976 BMW 633 (285 Nm @ 4250 RPM) has 165 more torque (in Nm) than 1970 Riley 4. (120 Nm @ 2500 RPM). This means 1976 BMW 633 will have an easier job in driving up hills or pulling heavy equipment than 1970 Riley 4.
Compare all specifications:
| 1976 BMW 633 | 1970 Riley 4 | |
| Make | BMW | Riley |
| Model | 633 | 4 |
| Year Released | 1976 | 1970 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3210 cc | 1622 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 197 HP | 67 HP |
| Engine RPM | 5500 RPM | 5000 RPM |
| Torque | 285 Nm | 120 Nm |
| Torque RPM | 4250 RPM | 2500 RPM |
| Engine Compression Ratio | 9.0:1 | 8.3:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1470 kg | 1148 kg |
| Vehicle Length | 4760 mm | 4540 mm |
| Vehicle Width | 1760 mm | 1620 mm |
| Vehicle Height | 1390 mm | 1510 mm |
| Wheelbase Size | 2630 mm | 2530 mm |
| Fuel Tank Capacity | 70 L | 45 L |
