2009 Audi A5 vs. 2005 Infiniti M
To start off, 2009 Audi A5 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Infiniti M. In addition, the cost of maintenance, including insurance, on 2005 Infiniti M would be higher. At 4,494 cc (8 cylinders), 2005 Infiniti M is equipped with a bigger engine. In terms of performance, 2005 Infiniti M (335 HP @ 6400 RPM) has 148 more horse power than 2009 Audi A5. (187 HP @ 3500 RPM) In normal driving conditions, 2005 Infiniti M should accelerate faster than 2009 Audi A5. With that said, vehicle weight also plays an important factor in acceleration. 2005 Infiniti M weights approximately 165 kg more than 2009 Audi A5. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Infiniti M is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2005 Infiniti M. However, in wet, icy, snow, or gravel driving conditions, 2009 Audi A5, being front wheel drive (FWD), will offer much better control with better grip. 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, 2005 Infiniti M (453 Nm @ 4000 RPM) has 53 more torque (in Nm) than 2009 Audi A5. (400 Nm @ 1400 RPM). This means 2005 Infiniti M will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A5.
Compare all specifications:
| 2009 Audi A5 | 2005 Infiniti M | |
| Make | Audi | Infiniti |
| Model | A5 | M |
| Year Released | 2009 | 2005 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2698 cc | 4494 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 187 HP | 335 HP |
| Engine RPM | 3500 RPM | 6400 RPM |
| Torque | 400 Nm | 453 Nm |
| Torque RPM | 1400 RPM | 4000 RPM |
| Engine Bore Size | 83 mm | 93 mm |
| Engine Stroke Size | 83.1 mm | 82.7 mm |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1575 kg | 1740 kg |
| Vehicle Length | 4630 mm | 5020 mm |
| Vehicle Width | 1860 mm | 1780 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2760 mm | 2810 mm |
| Fuel Tank Capacity | 65 L | 79 L |
