2007 Audi S4 vs. 1981 Renault 18
To start off, 2007 Audi S4 is newer by 26 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), 2007 Audi S4 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (340 HP @ 7000 RPM) has 274 more horse power than 1981 Renault 18. (66 HP @ 4500 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 1981 Renault 18. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S4 weights approximately 480 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.
Because 2007 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 1981 Renault 18. In wet, icy, snow, or gravel driving conditions, 2007 Audi S4 will offer significantly more control. 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, 2007 Audi S4 (410 Nm @ 3500 RPM) has 286 more torque (in Nm) than 1981 Renault 18. (124 Nm @ 2250 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 18.
Compare all specifications:
| 2007 Audi S4 | 1981 Renault 18 | |
| Make | Audi | Renault |
| Model | S4 | 18 |
| Year Released | 2007 | 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 | 7000 RPM | 4500 RPM |
| Torque | 410 Nm | 124 Nm |
| Torque RPM | 3500 RPM | 2250 RPM |
| Engine Bore Size | 84.5 mm | 86.1 mm |
| Engine Stroke Size | 93 mm | 89 mm |
| Fuel Type | Diesel | Diesel |
| Drive Type | 4WD | Front |
| Vehicle Weight | 1530 kg | 1050 kg |
| Vehicle Length | 4590 mm | 4410 mm |
| Vehicle Width | 1790 mm | 1710 mm |
| Vehicle Height | 1420 mm | 1410 mm |
| Wheelbase Size | 2660 mm | 2450 mm |
