2008 Audi A4 vs. 2009 BMW Z4
To start off, 2009 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi A4. In addition, the cost of maintenance, including insurance, on 2008 Audi A4 would be higher. At 2,494 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (215 HP @ 6500 RPM) has 101 more horse power than 2008 Audi A4. (114 HP @ 4000 RPM) In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2008 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 weights approximately 15 kg more than 2008 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Audi A4 (285 Nm @ 1900 RPM) has 35 more torque (in Nm) than 2009 BMW Z4. (250 Nm @ 2000 RPM). This means 2008 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4. 2009 BMW Z4 has automatic transmission and 2008 Audi A4 has manual transmission. 2008 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi A4 | 2009 BMW Z4 | |
| Make | Audi | BMW |
| Model | A4 | Z4 |
| Year Released | 2008 | 2009 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1896 cc | 2494 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 114 HP | 215 HP |
| Engine RPM | 4000 RPM | 6500 RPM |
| Torque | 285 Nm | 250 Nm |
| Torque RPM | 1900 RPM | 2000 RPM |
| Engine Bore Size | 79.6 mm | 82 mm |
| Engine Stroke Size | 95.5 mm | 78.8 mm |
| Engine Compression Ratio | 19.0:1 | 10.5:1 |
| Fuel Type | Diesel | Gasoline |
| Acceleration 0-100mph | 10.6 seconds | 7.5 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 | 1275 kg | 1290 kg |
| Vehicle Length | 4550 mm | 4100 mm |
| Vehicle Width | 1780 mm | 1790 mm |
| Vehicle Height | 1430 mm | 1310 mm |
| Wheelbase Size | 2660 mm | 2500 mm |
| Fuel Consumption Overall | 6.1 L/100km | 9.7 L/100km |
| Fuel Tank Capacity | 70 L | 55 L |
