1991 Opel Astra vs. 1979 Renault 18
To start off, 1991 Opel Astra is newer by 12 year(s). Which means there will be less support and parts availability for 1979 Renault 18. In addition, the cost of maintenance, including insurance, on 1979 Renault 18 would be higher. At 1,700 cc (4 cylinders), 1991 Opel Astra is equipped with a bigger engine. In terms of performance, 1979 Renault 18 (80 HP @ 5000 RPM) has 24 more horse power than 1991 Opel Astra. (56 HP @ 4600 RPM) In normal driving conditions, 1979 Renault 18 should accelerate faster than 1991 Opel Astra.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear 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, 1979 Renault 18 (136 Nm @ 3000 RPM) has 31 more torque (in Nm) than 1991 Opel Astra. (105 Nm @ 2400 RPM). This means 1979 Renault 18 will have an easier job in driving up hills or pulling heavy equipment than 1991 Opel Astra.
Compare all specifications:
| 1991 Opel Astra | 1979 Renault 18 | |
| Make | Opel | Renault |
| Model | Astra | 18 |
| Year Released | 1991 | 1979 |
| Engine Position | Front | Front |
| Engine Size | 1700 cc | 1647 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 56 HP | 80 HP |
| Engine RPM | 4600 RPM | 5000 RPM |
| Torque | 105 Nm | 136 Nm |
| Torque RPM | 2400 RPM | 3000 RPM |
| Engine Bore Size | 82.5 mm | 81 mm |
| Engine Stroke Size | 79.5 mm | 83.5 mm |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1025 kg | 1025 kg |
| Vehicle Length | 4280 mm | 4470 mm |
| Vehicle Width | 1690 mm | 1710 mm |
| Vehicle Height | 1430 mm | 1410 mm |
