2006 BMW Z4 vs. 2004 BMW 525
To start off, 2006 BMW Z4 is newer by 2 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 2,999 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (255 HP @ 6600 RPM) has 66 more horse power than 2004 BMW 525. (189 HP @ 6000 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2004 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW Z4 weights approximately 170 kg more than 2004 BMW 525. 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, 2006 BMW Z4 (298 Nm @ 2750 RPM) has 53 more torque (in Nm) than 2004 BMW 525. (245 Nm @ 3500 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW 525.
Compare all specifications:
| 2006 BMW Z4 | 2004 BMW 525 | |
| Make | BMW | BMW |
| Model | Z4 | 525 |
| Year Released | 2006 | 2004 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2999 cc | 2494 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 255 HP | 189 HP |
| Engine RPM | 6600 RPM | 6000 RPM |
| Torque | 298 Nm | 245 Nm |
| Torque RPM | 2750 RPM | 3500 RPM |
| Engine Compression Ratio | 10.7:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1835 kg | 1665 kg |
| Vehicle Length | 4100 mm | 4850 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1270 mm | 1500 mm |
| Wheelbase Size | 2500 mm | 2890 mm |
| Fuel Consumption | 7.8 L/100km | 7.9 L/100km |
| Fuel Consumption City | 11.8 L/100km | 14.7 L/100km |
| Fuel Consumption Overall | 9.8 L/100km | 10.3 L/100km |
| Fuel Tank Capacity | 55 L | 70 L |
