2009 Audi A6 vs. 2007 BMW Z4
To start off, 2009 Audi A6 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW Z4. In addition, the cost of maintenance, including insurance, on 2007 BMW Z4 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 120 more horse power than 2009 Audi A6. (218 HP @ 6300 RPM) In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2009 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A6 weights approximately 160 kg more than 2007 BMW Z4.
Because 2009 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, 2009 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, 2007 BMW Z4 (365 Nm @ 4900 RPM) has 65 more torque (in Nm) than 2009 Audi A6. (300 Nm @ 3200 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A6.
Compare all specifications:
| 2009 Audi A6 | 2007 BMW Z4 | |
| Make | Audi | BMW |
| Model | A6 | Z4 |
| Year Released | 2009 | 2007 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2976 cc | 3246 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 218 HP | 338 HP |
| Engine RPM | 6300 RPM | 7900 RPM |
| Torque | 300 Nm | 365 Nm |
| Torque RPM | 3200 RPM | 4900 RPM |
| Engine Bore Size | 82.5 mm | 87 mm |
| Engine Stroke Size | 92.8 mm | 91 mm |
| Engine Compression Ratio | 11.0:1 | 11.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 238 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.8 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 | 1645 kg | 1485 kg |
| Vehicle Length | 4800 mm | 4120 mm |
| Vehicle Width | 1820 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1310 mm |
| Wheelbase Size | 2770 mm | 2500 mm |
| Fuel Consumption Overall | 11.3 L/100km | 12.1 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
