2005 Audi S4 vs. 2009 BMW 545
To start off, 2009 BMW 545 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 4,398 cc (8 cylinders), 2009 BMW 545 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 12 more horse power than 2009 BMW 545. (328 HP @ 6100 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2009 BMW 545. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW 545 weights approximately 135 kg more than 2005 Audi S4.
Let's talk about torque, 2009 BMW 545 (450 Nm) has 40 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 BMW 545 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2009 BMW 545 | |
| Make | Audi | BMW |
| Model | S4 | 545 |
| Year Released | 2005 | 2009 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 328 HP |
| Engine RPM | 6300 RPM | 6100 RPM |
| Torque | 410 Nm | 450 Nm |
| Engine Bore Size | 85 mm | 92 mm |
| Engine Stroke Size | 93 mm | 82.7 mm |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1840 kg | 1975 kg |
| Vehicle Length | 4580 mm | 4850 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1500 mm |
| Wheelbase Size | 2660 mm | 2840 mm |
| Fuel Consumption Overall | 11.8 L/100km | 11.3 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
