2009 BMW Z4 vs. 2004 BMW 525
To start off, 2009 BMW Z4 is newer by 5 year(s). Which means there will be less support and parts availability for 2004 BMW 525. In addition, the cost of maintenance, including insurance, on 2004 BMW 525 would be higher. At 2,491 cc (6 cylinders), 2004 BMW 525 is equipped with a bigger engine. In terms of performance, 2004 BMW 525 (184 HP @ 7400 RPM) has 36 more horse power than 2009 BMW Z4. (148 HP @ 6200 RPM) In normal driving conditions, 2004 BMW 525 should accelerate faster than 2009 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 525 weights approximately 255 kg more than 2009 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 BMW 525 (237 Nm) has 37 more torque (in Nm) than 2009 BMW Z4. (200 Nm). This means 2004 BMW 525 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4.
Compare all specifications:
| 2009 BMW Z4 | 2004 BMW 525 | |
| Make | BMW | BMW |
| Model | Z4 | 525 |
| Year Released | 2009 | 2004 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 2491 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 184 HP |
| Engine RPM | 6200 RPM | 7400 RPM |
| Torque | 200 Nm | 237 Nm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1295 kg | 1550 kg |
| Vehicle Length | 4100 mm | 4850 mm |
| Vehicle Width | 1310 mm | 1850 mm |
| Vehicle Height | 1790 mm | 1480 mm |
| Wheelbase Size | 2500 mm | 2890 mm |
| Fuel Consumption Overall | 7.5 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 55 L | 70 L |
