2006 BMW Z4 vs. 2004 Audi A4
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 A4. In addition, the cost of maintenance, including insurance, on 2004 Audi A4 would be higher. At 2,983 cc (6 cylinders), 2004 Audi A4 is equipped with a bigger engine. In terms of performance, 2004 Audi A4 (220 HP @ 6300 RPM) has 31 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 2004 Audi A4 should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A4 weights approximately 375 kg more than 2006 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2004 Audi A4 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, 2004 Audi A4 (300 Nm @ 3200 RPM) has 55 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2004 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4. 2004 Audi A4 has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2004 Audi A4 | |
| Make | BMW | Audi |
| Model | Z4 | A4 |
| Year Released | 2006 | 2004 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 2983 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 189 HP | 220 HP |
| Engine RPM | 6000 RPM | 6300 RPM |
| Torque | 245 Nm | 300 Nm |
| Torque RPM | 3500 RPM | 3200 RPM |
| Engine Bore Size | 84 mm | 83 mm |
| Engine Stroke Size | 75 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 10.1:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 243 km/hour |
| Acceleration 0-100mph | 7 seconds | 6.9 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1335 kg | 1710 kg |
| Vehicle Length | 4100 mm | 4550 mm |
| Vehicle Width | 1790 mm | 1780 mm |
| Vehicle Height | 1310 mm | 1430 mm |
| Wheelbase Size | 2500 mm | 2660 mm |
| Fuel Consumption Overall | 9 L/100km | 10.5 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
