2005 Audi S4 vs. 2006 BMW 650
To start off, 2006 BMW 650 is newer by 1 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 4,800 cc (8 cylinders), 2006 BMW 650 is equipped with a bigger engine. In terms of performance, 2006 BMW 650 (360 HP @ 6300 RPM) has 20 more horse power than 2005 Audi S4. (340 HP @ 6200 RPM) In normal driving conditions, 2006 BMW 650 should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 52 kg more than 2006 BMW 650.
Let's talk about torque, 2006 BMW 650 (488 Nm) has 78 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2006 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2005 Audi S4 | 2006 BMW 650 | |
| Make | Audi | BMW |
| Model | S4 | 650 |
| Year Released | 2005 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4800 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 360 HP |
| Engine RPM | 6200 RPM | 6300 RPM |
| Torque | 410 Nm | 488 Nm |
| Engine Bore Size | 85 mm | 93 mm |
| Engine Stroke Size | 93 mm | 88.3 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1782 kg | 1730 kg |
| Vehicle Length | 4550 mm | 4840 mm |
| Vehicle Width | 1770 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1380 mm |
| Wheelbase Size | 2760 mm | 2790 mm |
| Fuel Consumption | 9.8 L/100km | 10.7 L/100km |
| Fuel Consumption City | 13.1 L/100km | 16.8 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 66 L | 70 L |
