2009 Infiniti QX56 vs. 2008 Infiniti M
To start off, 2009 Infiniti QX56 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Infiniti M. In addition, the cost of maintenance, including insurance, on 2008 Infiniti M would be higher. At 5,552 cc (8 cylinders), 2009 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2008 Infiniti M (325 HP @ 6400 RPM) has 5 more horse power than 2009 Infiniti QX56. (320 HP @ 5200 RPM) In normal driving conditions, 2008 Infiniti M should accelerate faster than 2009 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2009 Infiniti QX56 weights approximately 399 kg more than 2008 Infiniti M.
Because 2008 Infiniti M is four wheel drive (4WD), it will have significant more traction and grip than 2009 Infiniti QX56. In wet, icy, snow, or gravel driving conditions, 2008 Infiniti M 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, 2009 Infiniti QX56 (533 Nm @ 3400 RPM) has 77 more torque (in Nm) than 2008 Infiniti M. (456 Nm @ 4000 RPM). This means 2009 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2008 Infiniti M.
Compare all specifications:
| 2009 Infiniti QX56 | 2008 Infiniti M | |
| Make | Infiniti | Infiniti |
| Model | QX56 | M |
| Year Released | 2009 | 2008 |
| 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 | 325 HP |
| Engine RPM | 5200 RPM | 6400 RPM |
| Torque | 533 Nm | 456 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1719 kg | 1320 kg |
| Vehicle Length | 5260 mm | 4900 mm |
| Vehicle Width | 2010 mm | 1800 mm |
| Vehicle Height | 1980 mm | 1530 mm |
| Wheelbase Size | 3140 mm | 2910 mm |
| Fuel Consumption Highway | 13.1 L/100km | 11.9 L/100km |
| Fuel Consumption City | 19.6 L/100km | 17 L/100km |
| Fuel Consumption Overall | 16.8 L/100km | 14.9 L/100km |
| Fuel Tank Capacity | 106 L | 76 L |
