1999 Infiniti Q45 vs. 2005 Infiniti M
To start off, 2005 Infiniti M is newer by 6 year(s). Which means there will be less support and parts availability for 1999 Infiniti Q45. In addition, the cost of maintenance, including insurance, on 1999 Infiniti Q45 would be higher. At 4,494 cc (8 cylinders), 2005 Infiniti M is equipped with a bigger engine. In terms of performance, 2005 Infiniti M (335 HP @ 6400 RPM) has 70 more horse power than 1999 Infiniti Q45. (265 HP @ 5600 RPM) In normal driving conditions, 2005 Infiniti M should accelerate faster than 1999 Infiniti Q45. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti M weights approximately 32 kg more than 1999 Infiniti Q45. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2005 Infiniti M (453 Nm @ 4000 RPM) has 75 more torque (in Nm) than 1999 Infiniti Q45. (378 Nm @ 4000 RPM). This means 2005 Infiniti M will have an easier job in driving up hills or pulling heavy equipment than 1999 Infiniti Q45.
Compare all specifications:
| 1999 Infiniti Q45 | 2005 Infiniti M | |
| Make | Infiniti | Infiniti |
| Model | Q45 | M |
| Year Released | 1999 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4128 cc | 4494 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 265 HP | 335 HP |
| Engine RPM | 5600 RPM | 6400 RPM |
| Torque | 378 Nm | 453 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 93 mm | 93 mm |
| Engine Stroke Size | 76 mm | 82.7 mm |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1759 kg | 1791 kg |
| Vehicle Length | 5080 mm | 4900 mm |
| Vehicle Width | 1830 mm | 1800 mm |
| Vehicle Height | 1450 mm | 1520 mm |
| Wheelbase Size | 2840 mm | 2910 mm |
| Fuel Tank Capacity | 60 L | 75 L |
