2006 BMW Z4 vs. 2004 BMW 325
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 325. In addition, the cost of maintenance, including insurance, on 2004 BMW 325 would be higher. At 2,501 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (185 HP @ 6000 RPM) has 1 more horse power than 2004 BMW 325. (184 HP @ 7250 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2004 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW 325 weights approximately 265 kg more than 2006 BMW Z4.
Let's talk about torque, both vehicles can yield 237 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2006 BMW Z4 | 2004 BMW 325 | |
| Make | BMW | BMW |
| Model | Z4 | 325 |
| Year Released | 2006 | 2004 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2501 cc | 2490 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 184 HP |
| Engine RPM | 6000 RPM | 7250 RPM |
| Torque | 237 Nm | 237 Nm |
| Engine Bore Size | 84.1 mm | 84 mm |
| Engine Stroke Size | 74.9 mm | 75 mm |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1330 kg | 1595 kg |
| Vehicle Length | 4100 mm | 4480 mm |
| Vehicle Width | 1790 mm | 1750 mm |
| Vehicle Height | 1300 mm | 1420 mm |
| Wheelbase Size | 2500 mm | 2730 mm |
| Fuel Consumption Overall | 9 L/100km | 9.8 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
