2005 Audi S4 vs. 2007 BMW 650
To start off, 2007 BMW 650 is newer by 2 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 4,797 cc (8 cylinders), 2007 BMW 650 is equipped with a bigger engine. In terms of performance, 2007 BMW 650 (362 HP @ 6300 RPM) has 22 more horse power than 2005 Audi S4. (340 HP @ 6300 RPM) In normal driving conditions, 2007 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 95 kg more than 2007 BMW 650.
Let's talk about torque, 2007 BMW 650 (490 Nm) has 80 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2007 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 | 2007 BMW 650 | |
| Make | Audi | BMW |
| Model | S4 | 650 |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4797 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 362 HP |
| Engine RPM | 6300 RPM | 6300 RPM |
| Torque | 410 Nm | 490 Nm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1735 kg | 1640 kg |
| Vehicle Length | 4550 mm | 4830 mm |
| Vehicle Width | 1770 mm | 1380 mm |
| Vehicle Height | 1430 mm | 1860 mm |
| Wheelbase Size | 2660 mm | 2790 mm |
| Fuel Tank Capacity | 63 L | 70 L |
