2005 Infiniti M vs. 2006 Infiniti QX56
To start off, 2006 Infiniti QX56 is newer by 1 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 5,555 cc (8 cylinders), 2006 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2006 Infiniti QX56 (315 HP @ 4900 RPM) has 39 more horse power than 2005 Infiniti M. (276 HP @ 6200 RPM) In normal driving conditions, 2006 Infiniti QX56 should accelerate faster than 2005 Infiniti M. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti M weights approximately 495 kg more than 2006 Infiniti QX56.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear 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, 2006 Infiniti QX56 (529 Nm @ 3600 RPM) has 163 more torque (in Nm) than 2005 Infiniti M. (366 Nm @ 4800 RPM). This means 2006 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2005 Infiniti M.
Compare all specifications:
| 2005 Infiniti M | 2006 Infiniti QX56 | |
| Make | Infiniti | Infiniti |
| Model | M | QX56 |
| Year Released | 2005 | 2006 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 3498 cc | 5555 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 276 HP | 315 HP |
| Engine RPM | 6200 RPM | 4900 RPM |
| Torque | 366 Nm | 529 Nm |
| Torque RPM | 4800 RPM | 3600 RPM |
| Engine Bore Size | 96.1 mm | 98 mm |
| Engine Stroke Size | 81 mm | 92 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 7 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1815 kg | 1320 kg |
| Vehicle Length | 4900 mm | 5260 mm |
| Vehicle Width | 1800 mm | 2010 mm |
| Vehicle Height | 1520 mm | 1980 mm |
| Wheelbase Size | 2880 mm | 3140 mm |
| Fuel Tank Capacity | 75 L | 106 L |
