2008 BMW Z4 vs. 2005 BMW X5
To start off, 2008 BMW Z4 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW X5. In addition, the cost of maintenance, including insurance, on 2005 BMW X5 would be higher. At 3,246 cc (6 cylinders), 2008 BMW Z4 is equipped with a bigger engine. In terms of performance, 2008 BMW Z4 (338 HP @ 7900 RPM) has 123 more horse power than 2005 BMW X5. (215 HP @ 4000 RPM). In normal driving conditions, 2008 BMW Z4 should accelerate faster than 2005 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW X5 weights approximately 685 kg more than 2008 BMW Z4.
Because 2005 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, 2005 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, 2005 BMW X5 (520 Nm @ 2000 RPM) has 155 more torque (in Nm) than 2008 BMW Z4. (365 Nm @ 4900 RPM). This means 2005 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW Z4.
Compare all specifications:
| 2008 BMW Z4 | 2005 BMW X5 | |
| Make | BMW | BMW |
| Model | Z4 | X5 |
| Year Released | 2008 | 2005 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 3246 cc | 2926 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 215 HP |
| Engine RPM | 7900 RPM | 4000 RPM |
| Torque | 365 Nm | 520 Nm |
| Torque RPM | 4900 RPM | 2000 RPM |
| Engine Bore Size | 91 mm | 84 mm |
| Engine Stroke Size | 87 mm | 90 mm |
| Engine Compression Ratio | 11.5:1 | 18.0:1 |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 250 km/hour | 210 km/hour |
| Acceleration 0-100mph | 5 seconds | 8.3 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 | 1485 kg | 2170 kg |
| Vehicle Length | 4870 mm | 4670 mm |
| Vehicle Height | 1480 mm | 1720 mm |
| Wheelbase Size | 2500 mm | 2830 mm |
| Fuel Consumption Overall | 12.1 L/100km | 8.6 L/100km |
| Fuel Tank Capacity | 70 L | 93 L |
