2008 Audi A8 vs. 2003 Infiniti Q45
To start off, 2008 Audi A8 is newer by 5 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 18 more horse power than 2008 Audi A8. (322 HP @ 3750 RPM) In normal driving conditions, 2003 Infiniti Q45 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 141 kg more than 2003 Infiniti Q45.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Infiniti Q45. In wet, icy, snow, or gravel driving conditions, 2008 Audi A8 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, 2008 Audi A8 (650 Nm @ 1600 RPM) has 199 more torque (in Nm) than 2003 Infiniti Q45. (451 Nm @ 4000 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2003 Infiniti Q45.
Compare all specifications:
| 2008 Audi A8 | 2003 Infiniti Q45 | |
| Make | Audi | Infiniti |
| Model | A8 | Q45 |
| Year Released | 2008 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4134 cc | 4494 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 322 HP | 340 HP |
| Engine RPM | 3750 RPM | 6400 RPM |
| Torque | 650 Nm | 451 Nm |
| Torque RPM | 1600 RPM | 4000 RPM |
| Engine Compression Ratio | 16.5:1 | 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 | 1945 kg | 1804 kg |
| Vehicle Length | 5070 mm | 5080 mm |
| Vehicle Width | 1900 mm | 1850 mm |
| Vehicle Height | 1450 mm | 1500 mm |
| Wheelbase Size | 2950 mm | 2880 mm |
| Fuel Tank Capacity | 90 L | 81 L |
