2007 Audi A4 vs. 2009 Infiniti M
To start off, 2009 Infiniti M is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi A4. In addition, the cost of maintenance, including insurance, on 2007 Audi A4 would be higher. At 4,493 cc (8 cylinders), 2009 Infiniti M is equipped with a bigger engine. In terms of performance, 2009 Infiniti M (325 HP @ 6400 RPM) has 128 more horse power than 2007 Audi A4. (197 HP @ 5100 RPM) In normal driving conditions, 2009 Infiniti M should accelerate faster than 2007 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A4 weights approximately 256 kg more than 2009 Infiniti M.
Because 2009 Infiniti M is four wheel drive (4WD), it will have significant more traction and grip than 2007 Audi A4. In wet, icy, snow, or gravel driving conditions, 2009 Infiniti M 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, 2009 Infiniti M (456 Nm @ 4000 RPM) has 176 more torque (in Nm) than 2007 Audi A4. (280 Nm @ 1800 RPM). This means 2009 Infiniti M will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A4. 2009 Infiniti M has automatic transmission and 2007 Audi A4 has manual transmission. 2007 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Infiniti M will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Audi A4 | 2009 Infiniti M | |
| Make | Audi | Infiniti |
| Model | A4 | M |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1984 cc | 4493 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 197 HP | 325 HP |
| Engine RPM | 5100 RPM | 6400 RPM |
| Torque | 280 Nm | 456 Nm |
| Torque RPM | 1800 RPM | 4000 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1975 kg | 1719 kg |
| Vehicle Length | 4580 mm | 4940 mm |
| Vehicle Width | 1400 mm | 1810 mm |
| Vehicle Height | 1780 mm | 1530 mm |
| Wheelbase Size | 2650 mm | 2910 mm |
| Fuel Consumption Overall | 7.8 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 70 L | 76 L |
