2005 Audi A4 vs. 2006 Infiniti Q45
To start off, 2006 Infiniti Q45 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Audi A4. In addition, the cost of maintenance, including insurance, on 2005 Audi A4 would be higher. At 4,490 cc (8 cylinders), 2006 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2006 Infiniti Q45 (340 HP @ 6400 RPM) has 169 more horse power than 2005 Audi A4. (171 HP @ 6200 RPM) In normal driving conditions, 2006 Infiniti Q45 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A4 weights approximately 340 kg more than 2006 Infiniti Q45.
Because 2005 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 Infiniti Q45. In wet, icy, snow, or gravel driving conditions, 2005 Audi A4 will offer significantly more control. 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) has 227 more torque (in Nm) than 2005 Audi A4. (225 Nm). This means 2006 Infiniti Q45 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2006 Infiniti Q45 | |
| Make | Audi | Infiniti |
| Model | A4 | Q45 |
| Year Released | 2005 | 2006 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1786 cc | 4490 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 171 HP | 340 HP |
| Engine RPM | 6200 RPM | 6400 RPM |
| Torque | 225 Nm | 452 Nm |
| Engine Bore Size | 81 mm | 93 mm |
| Engine Stroke Size | 86 mm | 82.7 mm |
| Engine Compression Ratio | 9.3:1 | 9.5:1 |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1660 kg | 1320 kg |
| Vehicle Length | 4550 mm | 5110 mm |
| Vehicle Width | 1770 mm | 1850 mm |
| Vehicle Height | 1430 mm | 1500 mm |
| Wheelbase Size | 2770 mm | 2880 mm |
| Fuel Consumption | 8.4 L/100km | 10 L/100km |
| Fuel Consumption City | 11.8 L/100km | 14 L/100km |
| Fuel Consumption Overall | 10.2 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 63 L | 81 L |
