2007 BMW Z4 vs. 2009 Audi A4
To start off, 2009 Audi A4 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 2,996 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (255 HP @ 6600 RPM) has 38 more horse power than 2009 Audi A4. (217 HP @ 6300 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 212 kg more than 2007 BMW Z4.
Because 2009 Audi A4 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 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, 2009 Audi A4 (300 Nm @ 3200 RPM) has 2 more torque (in Nm) than 2007 BMW Z4. (298 Nm @ 2750 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2009 Audi A4 has automatic transmission and 2007 BMW Z4 has manual transmission. 2007 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW Z4 | 2009 Audi A4 | |
| Make | BMW | Audi |
| Model | Z4 | A4 |
| Year Released | 2007 | 2009 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 2975 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 255 HP | 217 HP |
| Engine RPM | 6600 RPM | 6300 RPM |
| Torque | 298 Nm | 300 Nm |
| Torque RPM | 2750 RPM | 3200 RPM |
| Engine Bore Size | 85 mm | 82.5 mm |
| Engine Stroke Size | 88 mm | 92.8 mm |
| Engine Compression Ratio | 10.7:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 236 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 8.9 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1398 kg | 1610 kg |
| Vehicle Length | 4100 mm | 4550 mm |
| Vehicle Width | 1790 mm | 1780 mm |
| Vehicle Height | 1300 mm | 1430 mm |
| Wheelbase Size | 2500 mm | 2660 mm |
| Fuel Consumption Overall | 9.8 L/100km | 10.9 L/100km |
| Fuel Tank Capacity | 55 L | 66 L |
