2005 Audi A4 vs. 2009 BMW Z4
To start off, 2009 BMW Z4 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi A4. In addition, the cost of maintenance, including insurance, on 2005 Audi A4 would be higher. At 2,983 cc (6 cylinders), 2005 Audi A4 is equipped with a bigger engine. In terms of performance, 2005 Audi A4 (247 HP @ 6300 RPM) has 99 more horse power than 2009 BMW Z4. (148 HP @ 6200 RPM). In normal driving conditions, 2005 Audi A4 should accelerate faster than 2009 BMW Z4.
Because 2005 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, 2005 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, 2005 Audi A4 (320 Nm @ 3250 RPM) has 120 more torque (in Nm) than 2009 BMW Z4. (200 Nm @ 3600 RPM). This means 2005 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4.
Compare all specifications:
| 2005 Audi A4 | 2009 BMW Z4 | |
| Make | Audi | BMW |
| Model | A4 | Z4 |
| Year Released | 2005 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2983 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 247 HP | 148 HP |
| Engine RPM | 6300 RPM | 6200 RPM |
| Torque | 320 Nm | 200 Nm |
| Torque RPM | 3250 RPM | 3600 RPM |
| Engine Compression Ratio | 13.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Length | 4590 mm | 4100 mm |
| Vehicle Width | 1780 mm | 1310 mm |
| Vehicle Height | 1430 mm | 1790 mm |
| Wheelbase Size | 2660 mm | 2500 mm |
