2008 Infiniti QX56 vs. 2005 Infiniti M
To start off, 2008 Infiniti QX56 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Infiniti M. In addition, the cost of maintenance, including insurance, on 2005 Infiniti M would be higher. At 5,552 cc (8 cylinders), 2008 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2005 Infiniti M (335 HP @ 6400 RPM) has 15 more horse power than 2008 Infiniti QX56. (320 HP @ 5200 RPM) In normal driving conditions, 2005 Infiniti M should accelerate faster than 2008 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti M weights approximately 470 kg more than 2008 Infiniti QX56. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Infiniti QX56 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Infiniti M. 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 72 more torque (in Nm) than 2005 Infiniti M. (461 Nm @ 4000 RPM). This means 2008 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2005 Infiniti M.
Compare all specifications:
| 2008 Infiniti QX56 | 2005 Infiniti M | |
| Make | Infiniti | Infiniti |
| Model | QX56 | M |
| Year Released | 2008 | 2005 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5552 cc | 4494 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 335 HP |
| Engine RPM | 5200 RPM | 6400 RPM |
| Torque | 533 Nm | 461 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1320 kg | 1790 kg |
| Vehicle Length | 5260 mm | 4900 mm |
| Vehicle Width | 2030 mm | 1800 mm |
| Vehicle Height | 2010 mm | 1520 mm |
| Wheelbase Size | 3140 mm | 2880 mm |
| Fuel Tank Capacity | 106 L | 75 L |
