2008 BMW Z4 vs. 2003 BMW X5
To start off, 2008 BMW Z4 is newer by 5 year(s). Which means there will be less support and parts availability for 2003 BMW X5. In addition, the cost of maintenance, including insurance, on 2003 BMW X5 would be higher. At 2,983 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 2008 BMW Z4. (175 HP @ 5800 RPM) In normal driving conditions, 2003 BMW X5 should accelerate faster than 2008 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X5 weights approximately 830 kg more than 2008 BMW Z4. 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 2008 BMW Z4. 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 2008 BMW Z4. (230 Nm @ 3500 RPM). This means 2003 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW Z4. 2003 BMW X5 has automatic transmission and 2008 BMW Z4 has manual transmission. 2008 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 BMW Z4 | 2003 BMW X5 | |
| Make | BMW | BMW |
| Model | Z4 | X5 |
| Year Released | 2008 | 2003 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2983 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 215 HP |
| Engine RPM | 5800 RPM | 4000 RPM |
| Torque | 230 Nm | 500 Nm |
| Torque RPM | 3500 RPM | 2000 RPM |
| Engine Compression Ratio | 11.0:1 | 18.0:1 |
| Top Speed | 229 km/hour | 205 km/hour |
| Acceleration 0-100mph | 6.5 seconds | 8.8 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1350 kg | 2180 kg |
| Vehicle Length | 4100 mm | 4670 mm |
| Vehicle Width | 1790 mm | 1880 mm |
| Vehicle Height | 1310 mm | 1720 mm |
| Wheelbase Size | 2500 mm | 2840 mm |
| Fuel Consumption Overall | 8.2 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 55 L | 93 L |
