1977 BMW 728 vs. 1970 Riley 4
To start off, 1977 BMW 728 is newer by 7 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 2,788 cc (6 cylinders), 1977 BMW 728 is equipped with a bigger engine. In terms of performance, 1977 BMW 728 (170 HP @ 6000 RPM) has 103 more horse power than 1970 Riley 4. (67 HP @ 5000 RPM). In normal driving conditions, 1977 BMW 728 should accelerate faster than 1970 Riley 4. With that said, vehicle weight also plays an important factor in acceleration. 1977 BMW 728 weights approximately 388 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, 1977 BMW 728 (235 Nm @ 3700 RPM) has 115 more torque (in Nm) than 1970 Riley 4. (120 Nm @ 2500 RPM). This means 1977 BMW 728 will have an easier job in driving up hills or pulling heavy equipment than 1970 Riley 4.
Compare all specifications:
1977 BMW 728 | 1970 Riley 4 | |
Make | BMW | Riley |
Model | 728 | 4 |
Year Released | 1977 | 1970 |
Body Type | Sedan | Sedan |
Engine Position | Front | Front |
Engine Size | 2788 cc | 1622 cc |
Engine Cylinders | 6 cylinders | 4 cylinders |
Engine Type | in-line | in-line |
Horse Power | 170 HP | 67 HP |
Engine RPM | 6000 RPM | 5000 RPM |
Torque | 235 Nm | 120 Nm |
Torque RPM | 3700 RPM | 2500 RPM |
Engine Bore Size | 86 mm | 76.2 mm |
Engine Stroke Size | 80 mm | 88.9 mm |
Engine Compression Ratio | 9.0:1 | 8.3:1 |
Drive Type | Rear | Rear |
Number of Seats | 5 seats | 5 seats |
Number of Doors | 4 doors | 4 doors |
Vehicle Weight | 1536 kg | 1148 kg |
Vehicle Length | 4870 mm | 4540 mm |
Vehicle Width | 1810 mm | 1620 mm |
Vehicle Height | 1440 mm | 1510 mm |
Wheelbase Size | 2800 mm | 2530 mm |
Fuel Tank Capacity | 85 L | 45 L |