2007 Audi A6 vs. 2005 BMW Z4
To start off, 2007 Audi A6 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 BMW Z4. In addition, the cost of maintenance, including insurance, on 2005 BMW Z4 would be higher. At 2,393 cc (6 cylinders), 2007 Audi A6 is equipped with a bigger engine. In terms of performance, both vehicles can yield 168 horse power. So under normal driving conditions, the acceleration of both vehicles should be relatively similar. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A6 weights approximately 315 kg more than 2005 BMW Z4.
Because 2007 Audi A6 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2007 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 Audi A6 (230 Nm @ 3200 RPM) has 20 more torque (in Nm) than 2005 BMW Z4. (210 Nm @ 3500 RPM). This means 2007 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW Z4. 2005 BMW Z4 has automatic transmission and 2007 Audi A6 has manual transmission. 2007 Audi A6 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Audi A6 | 2005 BMW Z4 | |
| Make | Audi | BMW |
| Model | A6 | Z4 |
| Year Released | 2007 | 2005 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 2171 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 168 HP | 168 HP |
| Engine RPM | 6000 RPM | 6250 RPM |
| Torque | 230 Nm | 210 Nm |
| Torque RPM | 3200 RPM | 3500 RPM |
| Engine Bore Size | 81 mm | 80 mm |
| Engine Stroke Size | 77.4 mm | 72 mm |
| Engine Compression Ratio | 11.0:1 | 10.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 218 km/hour | 225 km/hour |
| Acceleration 0-100mph | 9.9 seconds | 7.7 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1640 kg | 1325 kg |
| Vehicle Length | 4800 mm | 4100 mm |
| Vehicle Width | 1820 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1310 mm |
| Wheelbase Size | 2770 mm | 2500 mm |
| Fuel Consumption Overall | 10.8 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
