2005 BMW Z4 vs. 2008 Infiniti QX56
To start off, 2008 Infiniti QX56 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW Z4. In addition, the cost of maintenance, including insurance, on 2005 BMW Z4 would be higher. At 5,550 cc (8 cylinders), 2008 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2008 Infiniti QX56 (320 HP @ 5200 RPM) has 152 more horse power than 2005 BMW Z4. (168 HP @ 6250 RPM) In normal driving conditions, 2008 Infiniti QX56 should accelerate faster than 2005 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW Z4 weights approximately 5 kg more than 2008 Infiniti QX56.
Because 2008 Infiniti QX56 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2008 Infiniti QX56 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, 2008 Infiniti QX56 (533 Nm @ 3400 RPM) has 323 more torque (in Nm) than 2005 BMW Z4. (210 Nm @ 3500 RPM). This means 2008 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW Z4. 2008 Infiniti QX56 has automatic transmission and 2005 BMW Z4 has manual transmission. 2005 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Infiniti QX56 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 BMW Z4 | 2008 Infiniti QX56 | |
| Make | BMW | Infiniti |
| Model | Z4 | QX56 |
| Year Released | 2005 | 2008 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 5550 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 320 HP |
| Engine RPM | 6250 RPM | 5200 RPM |
| Torque | 210 Nm | 533 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 7 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1325 kg | 1320 kg |
| Vehicle Length | 4100 mm | 5260 mm |
| Vehicle Width | 1790 mm | 2030 mm |
| Vehicle Height | 1310 mm | 1960 mm |
| Wheelbase Size | 2500 mm | 3140 mm |
| Fuel Consumption Overall | 8.9 L/100km | 16.8 L/100km |
| Fuel Tank Capacity | 55 L | 106 L |
