2006 BMW Z4 vs. 2009 BMW X5
To start off, 2009 BMW X5 is newer by 3 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), 2009 BMW X5 is equipped with a bigger engine. In terms of performance, 2009 BMW X5 (350 HP @ 6300 RPM) has 161 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2009 BMW X5 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW X5 weights approximately 190 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 2009 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, 2009 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, 2009 BMW X5 (476 Nm @ 3400 RPM) has 231 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2009 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2009 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. 2009 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2009 BMW X5 | |
| Make | BMW | BMW |
| Model | Z4 | X5 |
| Year Released | 2006 | 2009 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 4799 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 350 HP |
| Engine RPM | 6000 RPM | 6300 RPM |
| Torque | 245 Nm | 476 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Bore Size | 84 mm | 93 mm |
| Engine Stroke Size | 75 mm | 88.3 mm |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 242 km/hour |
| Acceleration 0-100mph | 7 seconds | 6.5 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1335 kg | 1525 kg |
| Vehicle Length | 4100 mm | 4860 mm |
| Vehicle Width | 1790 mm | 1940 mm |
| Vehicle Height | 1310 mm | 1740 mm |
| Wheelbase Size | 2500 mm | 2940 mm |
| Fuel Consumption Overall | 9 L/100km | 12.5 L/100km |
| Fuel Tank Capacity | 55 L | 85 L |
