2004 Audi S4 vs. 2007 BMW 650
To start off, 2007 BMW 650 is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Audi S4. In addition, the cost of maintenance, including insurance, on 2004 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 23 more horse power than 2004 Audi S4. (339 HP @ 7000 RPM) In normal driving conditions, 2007 BMW 650 should accelerate faster than 2004 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi S4 weights approximately 80 kg more than 2007 BMW 650.
Because 2004 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 650. In wet, icy, snow, or gravel driving conditions, 2004 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, 2007 BMW 650 (490 Nm @ 3400 RPM) has 80 more torque (in Nm) than 2004 Audi S4. (410 Nm @ 3500 RPM). This means 2007 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi S4.
Compare all specifications:
| 2004 Audi S4 | 2007 BMW 650 | |
| Make | Audi | BMW |
| Model | S4 | 650 |
| Year Released | 2004 | 2007 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4797 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 339 HP | 362 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 410 Nm | 490 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.8 seconds | 5.4 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1720 kg | 1640 kg |
| Vehicle Length | 4590 mm | 4830 mm |
| Vehicle Width | 1780 mm | 1380 mm |
| Vehicle Height | 1430 mm | 1860 mm |
| Wheelbase Size | 2470 mm | 2790 mm |
| Fuel Tank Capacity | 63 L | 70 L |
