2008 Audi S4 vs. 2005 Infiniti M
To start off, 2008 Audi S4 is newer by 3 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, 2008 Audi S4 (339 HP @ 7000 RPM) has 4 more horse power than 2005 Infiniti M. (335 HP @ 6400 RPM). In normal driving conditions, 2008 Audi S4 should accelerate faster than 2005 Infiniti M. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S4 weights approximately 4 kg more than 2005 Infiniti M. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Infiniti M. In wet, icy, snow, or gravel driving conditions, 2008 Audi S4 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, 2005 Infiniti M (453 Nm @ 4000 RPM) has 43 more torque (in Nm) than 2008 Audi S4. (410 Nm @ 3500 RPM). This means 2005 Infiniti M will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi S4. 2005 Infiniti M has automatic transmission and 2008 Audi S4 has manual transmission. 2008 Audi S4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Infiniti M will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi S4 | 2005 Infiniti M | |
| Make | Audi | Infiniti |
| Model | S4 | M |
| Year Released | 2008 | 2005 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4494 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 339 HP | 335 HP |
| Engine RPM | 7000 RPM | 6400 RPM |
| Torque | 410 Nm | 453 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 93 mm |
| Engine Stroke Size | 92.8 mm | 82.7 mm |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1795 kg | 1791 kg |
| Vehicle Length | 4580 mm | 4900 mm |
| Vehicle Width | 1790 mm | 1800 mm |
| Vehicle Height | 1450 mm | 1520 mm |
| Wheelbase Size | 2660 mm | 2910 mm |
| Fuel Tank Capacity | 66 L | 75 L |
