2006 Audi S4 vs. 2008 BMW 523
To start off, 2008 BMW 523 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Audi S4. In addition, the cost of maintenance, including insurance, on 2006 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2006 Audi S4 is equipped with a bigger engine. In terms of performance, 2006 Audi S4 (340 HP @ 6800 RPM) has 165 more horse power than 2008 BMW 523. (175 HP @ 5800 RPM). In normal driving conditions, 2006 Audi S4 should accelerate faster than 2008 BMW 523. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi S4 weights approximately 40 kg more than 2008 BMW 523. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 523. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 Audi S4 (410 Nm @ 3500 RPM) has 180 more torque (in Nm) than 2008 BMW 523. (230 Nm @ 3500 RPM). This means 2006 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 523.
Compare all specifications:
| 2006 Audi S4 | 2008 BMW 523 | |
| Make | Audi | BMW |
| Model | S4 | 523 |
| Year Released | 2006 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2497 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 175 HP |
| Engine RPM | 6800 RPM | 5800 RPM |
| Torque | 410 Nm | 230 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Acceleration 0-100mph | 5.9 seconds | 8.5 seconds |
| Drive Type | 4WD | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1530 kg | 1490 kg |
| Vehicle Length | 4580 mm | 4870 mm |
| Vehicle Height | 1400 mm | 1420 mm |
| Wheelbase Size | 2660 mm | 2890 mm |
| Fuel Consumption Overall | 13.2 L/100km | 8.5 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
