2004 Audi A6 vs. 2006 BMW Z4
To start off, 2006 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2004 Audi A6. In addition, the cost of maintenance, including insurance, on 2004 Audi A6 would be higher. At 2,979 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (229 HP @ 5900 RPM) has 91 more horse power than 2004 Audi A6. (138 HP @ 4000 RPM) In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2004 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW Z4 weights approximately 90 kg more than 2004 Audi A6. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW Z4 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2004 Audi A6, being front wheel drive (FWD), will offer much better control with better grip. 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, 2004 Audi A6 (320 Nm @ 1750 RPM) has 20 more torque (in Nm) than 2006 BMW Z4. (300 Nm @ 3500 RPM). This means 2004 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2004 Audi A6 | 2006 BMW Z4 | |
| Make | Audi | BMW |
| Model | A6 | Z4 |
| Year Released | 2004 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1968 cc | 2979 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 229 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 320 Nm | 300 Nm |
| Torque RPM | 1750 RPM | 3500 RPM |
| Engine Compression Ratio | 19.5:1 | 10.2:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 205 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.3 seconds | 5.9 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1540 kg | 1630 kg |
| Vehicle Length | 4920 mm | 4570 mm |
| Vehicle Width | 1860 mm | 1790 mm |
| Vehicle Height | 1470 mm | 1680 mm |
| Wheelbase Size | 2850 mm | 2500 mm |
| Fuel Consumption Overall | 6 L/100km | 9.1 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
