2005 Audi RS6 vs. 2009 BMW Z4
To start off, 2009 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi RS6. In addition, the cost of maintenance, including insurance, on 2005 Audi RS6 would be higher. At 4,171 cc (8 cylinders), 2005 Audi RS6 is equipped with a bigger engine. In terms of performance, 2005 Audi RS6 (444 HP @ 5700 RPM) has 268 more horse power than 2009 BMW Z4. (176 HP @ 5800 RPM). In normal driving conditions, 2005 Audi RS6 should accelerate faster than 2009 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi RS6 weights approximately 480 kg more than 2009 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 Audi RS6 (560 Nm @ 1950 RPM) has 330 more torque (in Nm) than 2009 BMW Z4. (230 Nm @ 3500 RPM). This means 2005 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4.
Compare all specifications:
| 2005 Audi RS6 | 2009 BMW Z4 | |
| Make | Audi | BMW |
| Model | RS6 | Z4 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4171 cc | 2497 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 444 HP | 176 HP |
| Engine RPM | 5700 RPM | 5800 RPM |
| Torque | 560 Nm | 230 Nm |
| Torque RPM | 1950 RPM | 3500 RPM |
| Acceleration 0-100mph | 4.7 seconds | 6.5 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1825 kg | 1345 kg |
| Vehicle Length | 4800 mm | 4100 mm |
| Vehicle Height | 1460 mm | 1310 mm |
| Wheelbase Size | 2770 mm | 2500 mm |
| Fuel Consumption Overall | 14.6 L/100km | 8.2 L/100km |
| Fuel Tank Capacity | 82 L | 55 L |
