2005 BMW 645 vs. 2004 Infiniti QX56
To start off, 2005 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Infiniti QX56. In addition, the cost of maintenance, including insurance, on 2004 Infiniti QX56 would be higher. At 5,556 cc (8 cylinders), 2004 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (338 HP) has 23 more horse power than 2004 Infiniti QX56. (315 HP). In normal driving conditions, 2005 BMW 645 should accelerate faster than 2004 Infiniti QX56. With that said, vehicle weight also plays an important factor in acceleration. 2004 Infiniti QX56 weights approximately 716 kg more than 2005 BMW 645.
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, 2004 Infiniti QX56 (529 Nm) has 90 more torque (in Nm) than 2005 BMW 645. (439 Nm). This means 2004 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 645.
Compare all specifications:
| 2005 BMW 645 | 2004 Infiniti QX56 | |
| Make | BMW | Infiniti |
| Model | 645 | QX56 |
| Year Released | 2005 | 2004 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4390 cc | 5556 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 315 HP |
| Torque | 439 Nm | 529 Nm |
| Engine Bore Size | 92 mm | 98 mm |
| Engine Stroke Size | 83 mm | 92 mm |
| Engine Compression Ratio | 10.5:1 | 9.8:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 7 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1715 kg | 2431 kg |
| Vehicle Length | 4830 mm | 5260 mm |
| Vehicle Width | 1860 mm | 2010 mm |
| Vehicle Height | 1380 mm | 1980 mm |
| Wheelbase Size | 2790 mm | 3140 mm |
| Fuel Consumption | 9.4 L/100km | 12.4 L/100km |
| Fuel Consumption City | 13.8 L/100km | 18.1 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 15.7 L/100km |
| Fuel Tank Capacity | 70 L | 106 L |
