2005 BMW M3 vs. 2003 Infiniti Q45
To start off, 2005 BMW M3 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Infiniti Q45. In addition, the cost of maintenance, including insurance, on 2003 Infiniti Q45 would be higher. At 4,494 cc (8 cylinders), 2003 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2003 Infiniti Q45 (340 HP @ 6400 RPM) has 20 more horse power than 2005 BMW M3. (320 HP @ 7400 RPM) In normal driving conditions, 2003 Infiniti Q45 should accelerate faster than 2005 BMW M3. With that said, vehicle weight also plays an important factor in acceleration. 2003 Infiniti Q45 weights approximately 114 kg more than 2005 BMW M3. 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, 2003 Infiniti Q45 (451 Nm) has 114 more torque (in Nm) than 2005 BMW M3. (337 Nm). This means 2003 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW M3.
Compare all specifications:
| 2005 BMW M3 | 2003 Infiniti Q45 | |
| Make | BMW | Infiniti |
| Model | M3 | Q45 |
| Year Released | 2005 | 2003 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3244 cc | 4494 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 340 HP |
| Engine RPM | 7400 RPM | 6400 RPM |
| Torque | 337 Nm | 451 Nm |
| Engine Compression Ratio | 11.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1690 kg | 1804 kg |
| Vehicle Length | 4500 mm | 5080 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1380 mm | 1500 mm |
| Wheelbase Size | 2740 mm | 2880 mm |
| Fuel Tank Capacity | 63 L | 81 L |
