2004 Audi S4 vs. 1981 Renault 18
To start off, 2004 Audi S4 is newer by 23 year(s). Which means there will be less support and parts availability for 1981 Renault 18. In addition, the cost of maintenance, including insurance, on 1981 Renault 18 would be higher. At 4,163 cc (8 cylinders), 2004 Audi S4 is equipped with a bigger engine. In terms of performance, 2004 Audi S4 (340 HP @ 6200 RPM) has 274 more horse power than 1981 Renault 18. (66 HP @ 4500 RPM). In normal driving conditions, 2004 Audi S4 should accelerate faster than 1981 Renault 18. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi S4 weights approximately 845 kg more than 1981 Renault 18. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2004 Audi S4 (411 Nm) has 287 more torque (in Nm) than 1981 Renault 18. (124 Nm). This means 2004 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 18.
Compare all specifications:
| 2004 Audi S4 | 1981 Renault 18 | |
| Make | Audi | Renault |
| Model | S4 | 18 |
| Year Released | 2004 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2068 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 340 HP | 66 HP |
| Engine RPM | 6200 RPM | 4500 RPM |
| Torque | 411 Nm | 124 Nm |
| Engine Bore Size | 85 mm | 86.1 mm |
| Engine Stroke Size | 93 mm | 89 mm |
| Vehicle Weight | 1895 kg | 1050 kg |
| Vehicle Length | 4580 mm | 4410 mm |
| Vehicle Width | 1780 mm | 1710 mm |
| Vehicle Height | 1400 mm | 1410 mm |
| Wheelbase Size | 2770 mm | 2450 mm |
