2005 Audi A6 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Audi A6. In addition, the cost of maintenance, including insurance, on 2005 Audi A6 would be higher. At 3,246 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (338 HP @ 7900 RPM) has 160 more horse power than 2005 Audi A6. (178 HP @ 4000 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2005 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A6 weights approximately 245 kg more than 2007 BMW Z4.
Because 2005 Audi A6 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, 2005 Audi A6 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 A6 (370 Nm @ 1500 RPM) has 5 more torque (in Nm) than 2007 BMW Z4. (365 Nm @ 4900 RPM). This means 2005 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2005 Audi A6 | 2007 BMW Z4 | |
| Make | Audi | BMW |
| Model | A6 | Z4 |
| Year Released | 2005 | 2007 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 3246 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 178 HP | 338 HP |
| Engine RPM | 4000 RPM | 7900 RPM |
| Torque | 370 Nm | 365 Nm |
| Torque RPM | 1500 RPM | 4900 RPM |
| Engine Compression Ratio | 19.0:1 | 11.5:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 221 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.1 seconds | 5 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1730 kg | 1485 kg |
| Vehicle Length | 4800 mm | 4120 mm |
| Vehicle Width | 1820 mm | 1310 mm |
| Vehicle Height | 1460 mm | 1790 mm |
| Wheelbase Size | 2660 mm | 2500 mm |
| Fuel Consumption Overall | 8.3 L/100km | 12.1 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
