2003 BMW X3 vs. 1991 BMW Z1
To start off, 2003 BMW X3 is newer by 12 year(s). Which means there will be less support and parts availability for 1991 BMW Z1. In addition, the cost of maintenance, including insurance, on 1991 BMW Z1 would be higher. At 2,497 cc (6 cylinders), 1991 BMW Z1 is equipped with a bigger engine. In terms of performance, 2003 BMW X3 (185 HP @ 6000 RPM) has 10 more horse power than 1991 BMW Z1. (175 HP @ 5800 RPM). In normal driving conditions, 2003 BMW X3 should accelerate faster than 1991 BMW Z1. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X3 weights approximately 590 kg more than 1991 BMW Z1. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW Z1. In wet, icy, snow, or gravel driving conditions, 2003 BMW X3 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, 2003 BMW X3 (245 Nm @ 3500 RPM) has 15 more torque (in Nm) than 1991 BMW Z1. (230 Nm @ 4000 RPM). This means 2003 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW Z1. 2003 BMW X3 has automatic transmission and 1991 BMW Z1 has manual transmission. 1991 BMW Z1 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW X3 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW X3 | 1991 BMW Z1 | |
| Make | BMW | BMW |
| Model | X3 | Z1 |
| Year Released | 2003 | 1991 |
| Body Type | SUV | Roadster |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 2497 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 185 HP | 175 HP |
| Engine RPM | 6000 RPM | 5800 RPM |
| Torque | 245 Nm | 230 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84 mm | 82 mm |
| Engine Stroke Size | 75 mm | 78.8 mm |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 1840 kg | 1250 kg |
| Vehicle Length | 4570 mm | 3960 mm |
| Vehicle Width | 1860 mm | 1810 mm |
| Vehicle Height | 1680 mm | 1280 mm |
| Wheelbase Size | 2800 mm | 2450 mm |
