2007 BMW Z4 vs. 2006 BMW X3
To start off, 2007 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW X3. In addition, the cost of maintenance, including insurance, on 2006 BMW X3 would be higher. At 2,979 cc (6 cylinders), 2006 BMW X3 is equipped with a bigger engine. In terms of performance, 2006 BMW X3 (227 HP @ 5900 RPM) has 79 more horse power than 2007 BMW Z4. (148 HP @ 6200 RPM) In normal driving conditions, 2006 BMW X3 should accelerate faster than 2007 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW X3 weights approximately 540 kg more than 2007 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW X3 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, 2006 BMW X3 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, 2006 BMW X3 (291 Nm @ 3500 RPM) has 91 more torque (in Nm) than 2007 BMW Z4. (200 Nm @ 3600 RPM). This means 2006 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2007 BMW Z4 | 2006 BMW X3 | |
| Make | BMW | BMW |
| Model | Z4 | X3 |
| Year Released | 2007 | 2006 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 1993 cc | 2979 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 227 HP |
| Engine RPM | 6200 RPM | 5900 RPM |
| Torque | 200 Nm | 291 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 84.1 mm |
| Engine Stroke Size | 90 mm | 89.7 mm |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 220 km/hour | 210 km/hour |
| Acceleration 0-100mph | 8.2 seconds | 7.8 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1295 kg | 1835 kg |
| Vehicle Length | 4100 mm | 4570 mm |
| Vehicle Width | 1310 mm | 1860 mm |
| Vehicle Height | 1790 mm | 1680 mm |
| Wheelbase Size | 2500 mm | 2800 mm |
| Fuel Consumption Overall | 7.5 L/100km | 11.4 L/100km |
| Fuel Tank Capacity | 55 L | 67 L |
