2006 Cadillac STS vs. 1991 Citroen ZX
To start off, 2006 Cadillac STS is newer by 15 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 3,563 cc (6 cylinders), 2006 Cadillac STS is equipped with a bigger engine. In terms of performance, 2006 Cadillac STS (253 HP @ 6500 RPM) has 164 more horse power than 1991 Citroen ZX. (89 HP @ 6400 RPM). In normal driving conditions, 2006 Cadillac STS should accelerate faster than 1991 Citroen ZX. With that said, vehicle weight also plays an important factor in acceleration. 2006 Cadillac STS weights approximately 782 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 2006 Cadillac STS is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 1991 Citroen ZX, being front wheel drive (FWD), will offer much better control with better grip. 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, 2006 Cadillac STS (342 Nm @ 3200 RPM) has 209 more torque (in Nm) than 1991 Citroen ZX. (133 Nm @ 3000 RPM). This means 2006 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 1991 Citroen ZX. 2006 Cadillac STS has automatic transmission and 1991 Citroen ZX has manual transmission. 1991 Citroen ZX will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 Cadillac STS | 1991 Citroen ZX | |
| Make | Cadillac | Citroen |
| Model | STS | ZX |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 3563 cc | 1579 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 253 HP | 89 HP |
| Engine RPM | 6500 RPM | 6400 RPM |
| Torque | 342 Nm | 133 Nm |
| Torque RPM | 3200 RPM | 3000 RPM |
| Engine Bore Size | 94 mm | 83 mm |
| Engine Stroke Size | 85.6 mm | 73 mm |
| Top Speed | 229 km/hour | 180 km/hour |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1782 kg | 1000 kg |
| Vehicle Length | 4990 mm | 4070 mm |
| Vehicle Width | 1850 mm | 1710 mm |
| Vehicle Height | 1470 mm | 1410 mm |
| Wheelbase Size | 2960 mm | 2430 mm |
