2007 Audi S4 vs. 1991 Citroen ZX
To start off, 2007 Audi S4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Citroen ZX. In addition, the cost of maintenance, including insurance, on 1991 Citroen ZX 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 265 more horse power than 1991 Citroen ZX. (75 HP @ 5800 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 1991 Citroen ZX. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S4 weights approximately 275 kg more than 1991 Citroen ZX. 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 1991 Citroen ZX. 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 (411 Nm @ 3500 RPM) has 301 more torque (in Nm) than 1991 Citroen ZX. (110 Nm @ 3400 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Citroen ZX.
Compare all specifications:
| 2007 Audi S4 | 1991 Citroen ZX | |
| Make | Audi | Citroen |
| Model | S4 | ZX |
| Year Released | 2007 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 1360 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 340 HP | 75 HP |
| Engine RPM | 7000 RPM | 5800 RPM |
| Torque | 411 Nm | 110 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Bore Size | 84.5 mm | 75 mm |
| Engine Stroke Size | 93 mm | 77 mm |
| Top Speed | 250 km/hour | 167 km/hour |
| Drive Type | 4WD | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 1275 kg | 1000 kg |
| Vehicle Length | 4580 mm | 4070 mm |
| Vehicle Width | 1790 mm | 1710 mm |
| Vehicle Height | 1450 mm | 1410 mm |
| Wheelbase Size | 2660 mm | 2550 mm |
| Fuel Tank Capacity | 63 L | 56 L |
