2009 Audi S4 vs. 2006 BMW 525
To start off, 2009 Audi S4 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 BMW 525. In addition, the cost of maintenance, including insurance, on 2006 BMW 525 would be higher. At 4,161 cc (8 cylinders), 2009 Audi S4 is equipped with a bigger engine. In terms of performance, 2009 Audi S4 (340 HP @ 6800 RPM) has 125 more horse power than 2006 BMW 525. (215 HP @ 6250 RPM). In normal driving conditions, 2009 Audi S4 should accelerate faster than 2006 BMW 525.
Because 2009 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 525. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi S4 (410 Nm @ 3500 RPM) has 159 more torque (in Nm) than 2006 BMW 525. (251 Nm @ 2750 RPM). This means 2009 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 525.
Compare all specifications:
| 2009 Audi S4 | 2006 BMW 525 | |
| Make | Audi | BMW |
| Model | S4 | 525 |
| Year Released | 2009 | 2006 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2999 cc |
| Horse Power | 340 HP | 215 HP |
| Engine RPM | 6800 RPM | 6250 RPM |
| Torque | 410 Nm | 251 Nm |
| Torque RPM | 3500 RPM | 2750 RPM |
| Engine Bore Size | 84.5 mm | 85.1 mm |
| Engine Stroke Size | 92.8 mm | 87.9 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Length | 4580 mm | 4860 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2660 mm | 2890 mm |
| Fuel Consumption Highway | 11.2 L/100km | 8.4 L/100km |
| Fuel Consumption City | 16.8 L/100km | 12.4 L/100km |
| Fuel Consumption Overall | 14.7 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
