1977 BMW 728 vs. 1981 Renault 9
To start off, 1981 Renault 9 is newer by 4 year(s). Which means there will be less support and parts availability for 1977 BMW 728. In addition, the cost of maintenance, including insurance, on 1977 BMW 728 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 85 more horse power than 1981 Renault 9. (85 HP @ 5000 RPM). In normal driving conditions, 1977 BMW 728 should accelerate faster than 1981 Renault 9. With that said, vehicle weight also plays an important factor in acceleration. 1977 BMW 728 weights approximately 630 kg more than 1981 Renault 9. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1977 BMW 728 (235 Nm @ 3700 RPM) has 96 more torque (in Nm) than 1981 Renault 9. (139 Nm @ 3250 RPM). This means 1977 BMW 728 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 9.
Compare all specifications:
1977 BMW 728 | 1981 Renault 9 | |
Make | BMW | Renault |
Model | 728 | 9 |
Year Released | 1977 | 1981 |
Engine Position | Front | Front |
Engine Size | 2788 cc | 1721 cc |
Engine Cylinders | 6 cylinders | 4 cylinders |
Engine Type | in-line | in-line |
Horse Power | 170 HP | 85 HP |
Engine RPM | 6000 RPM | 5000 RPM |
Torque | 235 Nm | 139 Nm |
Torque RPM | 3700 RPM | 3250 RPM |
Engine Bore Size | 86 mm | 81 mm |
Engine Stroke Size | 80 mm | 83.5 mm |
Vehicle Weight | 1536 kg | 906 kg |
Vehicle Length | 4870 mm | 4070 mm |
Vehicle Width | 1810 mm | 1660 mm |
Vehicle Height | 1440 mm | 1410 mm |
Wheelbase Size | 2800 mm | 2490 mm |