1981 Renault 9 vs. 2009 BMW 523
To start off, 2009 BMW 523 is newer by 28 year(s). Which means there will be less support and parts availability for 1981 Renault 9. In addition, the cost of maintenance, including insurance, on 1981 Renault 9 would be higher. At 2,497 cc (6 cylinders), 2009 BMW 523 is equipped with a bigger engine. In terms of performance, 2009 BMW 523 (175 HP @ 5800 RPM) has 90 more horse power than 1981 Renault 9. (85 HP @ 5000 RPM) In normal driving conditions, 2009 BMW 523 should accelerate faster than 1981 Renault 9. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 523 weights approximately 659 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, 2009 BMW 523 (230 Nm @ 3500 RPM) has 91 more torque (in Nm) than 1981 Renault 9. (139 Nm @ 3250 RPM). This means 2009 BMW 523 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 9.
Compare all specifications:
| 1981 Renault 9 | 2009 BMW 523 | |
| Make | Renault | BMW |
| Model | 9 | 523 |
| Year Released | 1981 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 1721 cc | 2497 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 85 HP | 175 HP |
| Engine RPM | 5000 RPM | 5800 RPM |
| Torque | 139 Nm | 230 Nm |
| Torque RPM | 3250 RPM | 3500 RPM |
| Engine Bore Size | 81 mm | 82.1 mm |
| Engine Stroke Size | 83.5 mm | 78.8 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Vehicle Weight | 906 kg | 1565 kg |
| Vehicle Length | 4070 mm | 4850 mm |
| Vehicle Width | 1660 mm | 1850 mm |
| Vehicle Height | 1410 mm | 1470 mm |
| Wheelbase Size | 2490 mm | 2890 mm |
