2003 BMW X5 vs. 1987 BMW Z1
To start off, 2003 BMW X5 is newer by 16 year(s). Which means there will be less support and parts availability for 1987 BMW Z1. In addition, the cost of maintenance, including insurance, on 1987 BMW Z1 would be higher. At 2,979 cc (6 cylinders), 2003 BMW X5 is equipped with a bigger engine. In terms of performance, 2003 BMW X5 (215 HP @ 4000 RPM) has 40 more horse power than 1987 BMW Z1. (175 HP @ 5800 RPM). In normal driving conditions, 2003 BMW X5 should accelerate faster than 1987 BMW Z1. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X5 weights approximately 920 kg more than 1987 BMW Z1. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1987 BMW Z1. In wet, icy, snow, or gravel driving conditions, 2003 BMW X5 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 X5 (500 Nm @ 2000 RPM) has 270 more torque (in Nm) than 1987 BMW Z1. (230 Nm @ 4000 RPM). This means 2003 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1987 BMW Z1.
Compare all specifications:
| 2003 BMW X5 | 1987 BMW Z1 | |
| Make | BMW | BMW |
| Model | X5 | Z1 |
| Year Released | 2003 | 1987 |
| Body Type | SUV | Roadster |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 2494 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 215 HP | 175 HP |
| Engine RPM | 4000 RPM | 5800 RPM |
| Torque | 500 Nm | 230 Nm |
| Torque RPM | 2000 RPM | 4000 RPM |
| Engine Bore Size | 84.1 mm | 82 mm |
| Engine Stroke Size | 90 mm | 78.8 mm |
| Engine Compression Ratio | 18.0:1 | 11.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 2170 kg | 1250 kg |
| Vehicle Length | 4670 mm | 3960 mm |
| Vehicle Width | 1880 mm | 1810 mm |
| Vehicle Height | 1720 mm | 1280 mm |
| Wheelbase Size | 2940 mm | 2450 mm |
