2003 BMW X5 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 4 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 3,246 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (338 HP @ 7900 RPM) has 123 more horse power than 2003 BMW X5. (215 HP @ 4000 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2003 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X5 weights approximately 695 kg more than 2007 BMW Z4.
Because 2003 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 2007 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 135 more torque (in Nm) than 2007 BMW Z4. (365 Nm @ 4900 RPM). This means 2003 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2003 BMW X5 has automatic transmission and 2007 BMW Z4 has manual transmission. 2007 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:
| 2003 BMW X5 | 2007 BMW Z4 | |
| Make | BMW | BMW |
| Model | X5 | Z4 |
| Year Released | 2003 | 2007 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2983 cc | 3246 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 338 HP |
| Engine RPM | 4000 RPM | 7900 RPM |
| Torque | 500 Nm | 365 Nm |
| Torque RPM | 2000 RPM | 4900 RPM |
| Engine Compression Ratio | 18.0:1 | 11.5:1 |
| Top Speed | 205 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.8 seconds | 5 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2180 kg | 1485 kg |
| Vehicle Length | 4670 mm | 4120 mm |
| Vehicle Width | 1880 mm | 1790 mm |
| Vehicle Height | 1720 mm | 1310 mm |
| Wheelbase Size | 2840 mm | 2500 mm |
| Fuel Consumption Overall | 9.4 L/100km | 12.1 L/100km |
| Fuel Tank Capacity | 93 L | 55 L |
