2009 Infiniti QX56 vs. 1990 Infiniti Q45
To start off, 2009 Infiniti QX56 is newer by 19 year(s). Which means there will be less support and parts availability for 1990 Infiniti Q45. In addition, the cost of maintenance, including insurance, on 1990 Infiniti Q45 would be higher. At 5,552 cc (8 cylinders), 2009 Infiniti QX56 is equipped with a bigger engine. In terms of performance, 2009 Infiniti QX56 (320 HP @ 5200 RPM) has 43 more horse power than 1990 Infiniti Q45. (277 HP @ 6000 RPM). In normal driving conditions, 2009 Infiniti QX56 should accelerate faster than 1990 Infiniti Q45. With that said, vehicle weight also plays an important factor in acceleration. 1990 Infiniti Q45 weights approximately 31 kg more than 2009 Infiniti QX56.
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, 2009 Infiniti QX56 (533 Nm @ 3400 RPM) has 137 more torque (in Nm) than 1990 Infiniti Q45. (396 Nm @ 4000 RPM). This means 2009 Infiniti QX56 will have an easier job in driving up hills or pulling heavy equipment than 1990 Infiniti Q45.
Compare all specifications:
| 2009 Infiniti QX56 | 1990 Infiniti Q45 | |
| Make | Infiniti | Infiniti |
| Model | QX56 | Q45 |
| Year Released | 2009 | 1990 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5552 cc | 4493 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 277 HP |
| Engine RPM | 5200 RPM | 6000 RPM |
| Torque | 533 Nm | 396 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1719 kg | 1750 kg |
| Vehicle Length | 5260 mm | 5080 mm |
| Vehicle Width | 2010 mm | 1830 mm |
| Vehicle Height | 1980 mm | 1440 mm |
| Wheelbase Size | 3140 mm | 2890 mm |
| Fuel Tank Capacity | 106 L | 72 L |
