2007 BMW X5 vs. 2006 BMW Z4
To start off, 2007 BMW X5 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW Z4. In addition, the cost of maintenance, including insurance, on 2006 BMW Z4 would be higher. At 4,799 cc (8 cylinders), 2007 BMW X5 is equipped with a bigger engine. In terms of performance, 2007 BMW X5 (350 HP @ 6300 RPM) has 202 more horse power than 2006 BMW Z4. (148 HP @ 6200 RPM). In normal driving conditions, 2007 BMW X5 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 874 kg more than 2006 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 BMW X5 (475 Nm @ 3400 RPM) has 275 more torque (in Nm) than 2006 BMW Z4. (200 Nm @ 3600 RPM). This means 2007 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2007 BMW X5 has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW X5 | 2006 BMW Z4 | |
| Make | BMW | BMW |
| Model | X5 | Z4 |
| Year Released | 2007 | 2006 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4799 cc | 1995 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 350 HP | 148 HP |
| Engine RPM | 6300 RPM | 6200 RPM |
| Torque | 475 Nm | 200 Nm |
| Torque RPM | 3400 RPM | 3600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 237 km/hour | 220 km/hour |
| Acceleration 0-100mph | 6.5 seconds | 8.2 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 | 2200 kg | 1326 kg |
| Vehicle Length | 4670 mm | 4100 mm |
| Vehicle Width | 1940 mm | 1790 mm |
| Vehicle Height | 1740 mm | 1310 mm |
| Wheelbase Size | 2940 mm | 2500 mm |
| Fuel Consumption Overall | 12.5 L/100km | 7.5 L/100km |
| Fuel Tank Capacity | 85 L | 55 L |
