2008 BMW Z4 vs. 2005 Infiniti QX56
To start off, 2008 BMW Z4 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Infiniti QX56. In addition, the cost of maintenance, including insurance, on 2005 Infiniti QX56 would be higher. At 5,555 cc (8 cylinders), 2005 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2005 Infiniti QX56 (315 HP @ 6400 RPM) has 100 more horse power than 2008 BMW Z4. (215 HP @ 6500 RPM) In normal driving conditions, 2005 Infiniti QX56 should accelerate faster than 2008 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti QX56 weights approximately 1141 kg more than 2008 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 Infiniti QX56 (529 Nm) has 279 more torque (in Nm) than 2008 BMW Z4. (250 Nm). This means 2005 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW Z4.
Compare all specifications:
| 2008 BMW Z4 | 2005 Infiniti QX56 | |
| Make | BMW | Infiniti |
| Model | Z4 | QX56 |
| Year Released | 2008 | 2005 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 5555 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 315 HP |
| Engine RPM | 6500 RPM | 6400 RPM |
| Torque | 250 Nm | 529 Nm |
| Engine Compression Ratio | 10.5:1 | 9.8:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 2 seats | 7 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1290 kg | 2431 kg |
| Vehicle Length | 4100 mm | 5260 mm |
| Vehicle Width | 1790 mm | 2010 mm |
| Vehicle Height | 1310 mm | 1960 mm |
| Wheelbase Size | 2500 mm | 3140 mm |
| Fuel Consumption Overall | 9.5 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 55 L | 106 L |
