2005 Audi A4 vs. 2002 Infiniti Q45
To start off, 2005 Audi A4 is newer by 3 year(s). Which means there will be less support and parts availability for 2002 Infiniti Q45. In addition, the cost of maintenance, including insurance, on 2002 Infiniti Q45 would be higher. At 4,493 cc (8 cylinders), 2002 Infiniti Q45 is equipped with a bigger engine. In terms of performance, 2002 Infiniti Q45 (288 HP @ 6000 RPM) has 68 more horse power than 2005 Audi A4. (220 HP @ 6300 RPM) In normal driving conditions, 2002 Infiniti Q45 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2002 Infiniti Q45 weights approximately 125 kg more than 2005 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2002 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, 2002 Infiniti Q45 (396 Nm @ 4000 RPM) has 96 more torque (in Nm) than 2005 Audi A4. (300 Nm @ 3200 RPM). This means 2002 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 | 2002 Infiniti Q45 | |
| Make | Audi | Infiniti |
| Model | A4 | Q45 |
| Year Released | 2005 | 2002 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2983 cc | 4493 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 220 HP | 288 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 300 Nm | 396 Nm |
| Torque RPM | 3200 RPM | 4000 RPM |
| Engine Bore Size | 83 mm | 93 mm |
| Engine Stroke Size | 93 mm | 82.8 mm |
| Engine Compression Ratio | 10.1:1 | 10.5:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1645 kg | 1770 kg |
| Vehicle Length | 4550 mm | 5080 mm |
| Vehicle Width | 1770 mm | 1850 mm |
| Vehicle Height | 1430 mm | 1500 mm |
| Wheelbase Size | 2660 mm | 2880 mm |
| Fuel Tank Capacity | 66 L | 60 L |
