2003 BMW M3 vs. 2006 Infiniti Q45
To start off, 2006 Infiniti Q45 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 BMW M3. In addition, the cost of maintenance, including insurance, on 2003 BMW M3 would be higher. At 4,494 cc (8 cylinders), 2006 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2006 Infiniti Q45 (340 HP @ 6400 RPM) has 100 more horse power than 2003 BMW M3. (240 HP @ 6000 RPM) In normal driving conditions, 2006 Infiniti Q45 should accelerate faster than 2003 BMW M3. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW M3 weights approximately 122 kg more than 2006 Infiniti Q45.
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, 2006 Infiniti Q45 (452 Nm @ 4000 RPM) has 152 more torque (in Nm) than 2003 BMW M3. (300 Nm @ 4250 RPM). This means 2006 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW M3. 2006 Infiniti Q45 has automatic transmission and 2003 BMW M3 has manual transmission. 2003 BMW M3 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Infiniti Q45 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW M3 | 2006 Infiniti Q45 | |
| Make | BMW | Infiniti |
| Model | M3 | Q45 |
| Year Released | 2003 | 2006 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4494 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 240 HP | 340 HP |
| Engine RPM | 6000 RPM | 6400 RPM |
| Torque | 300 Nm | 452 Nm |
| Torque RPM | 4250 RPM | 4000 RPM |
| Engine Bore Size | 86 mm | 93 mm |
| Engine Stroke Size | 85.8 mm | 82.7 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1442 kg | 1320 kg |
| Vehicle Length | 4440 mm | 5110 mm |
| Vehicle Width | 1720 mm | 1850 mm |
| Vehicle Height | 1340 mm | 1500 mm |
| Wheelbase Size | 2730 mm | 2880 mm |
| Fuel Tank Capacity | 65 L | 81 L |
