2003 Audi RS6 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Audi RS6. In addition, the cost of maintenance, including insurance, on 2003 Audi RS6 would be higher. At 4,163 cc (8 cylinders), 2003 Audi RS6 is equipped with a bigger engine. In terms of performance, 2003 Audi RS6 (444 HP @ 6300 RPM) has 86 more horse power than 2007 BMW Z4. (358 HP @ 7900 RPM). In normal driving conditions, 2003 Audi RS6 should accelerate faster than 2007 BMW Z4.
Because 2003 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2003 Audi RS6 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, 2003 Audi RS6 (560 Nm @ 1950 RPM) has 175 more torque (in Nm) than 2007 BMW Z4. (385 Nm @ 4900 RPM). This means 2003 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2003 Audi RS6 | 2007 BMW Z4 | |
| Make | Audi | BMW |
| Model | RS6 | Z4 |
| Year Released | 2003 | 2007 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 3199 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 444 HP | 358 HP |
| Engine RPM | 6300 RPM | 7900 RPM |
| Torque | 560 Nm | 385 Nm |
| Torque RPM | 1950 RPM | 4900 RPM |
| Engine Compression Ratio | 9.3:1 | 11.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 273 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Length | 4860 mm | 4100 mm |
| Vehicle Width | 1860 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1300 mm |
| Wheelbase Size | 2760 mm | 2500 mm |
