2004 BMW Z4 vs. 2006 BMW 323
To start off, 2006 BMW 323 is newer by 2 year(s). Which means there will be less support and parts availability for 2004 BMW Z4. In addition, the cost of maintenance, including insurance, on 2004 BMW Z4 would be higher. At 2,497 cc, 2006 BMW 323 is equipped with a bigger engine. In terms of performance, 2004 BMW Z4 (185 HP @ 6000 RPM) has 10 more horse power than 2006 BMW 323. (175 HP @ 5800 RPM). In normal driving conditions, 2004 BMW Z4 should accelerate faster than 2006 BMW 323.
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 Z4 (245 Nm) has 15 more torque (in Nm) than 2006 BMW 323. (230 Nm). This means 2004 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 323.
Compare all specifications:
| 2004 BMW Z4 | 2006 BMW 323 | |
| Make | BMW | BMW |
| Model | Z4 | 323 |
| Year Released | 2004 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 2497 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 185 HP | 175 HP |
| Engine RPM | 6000 RPM | 5800 RPM |
| Torque | 245 Nm | 230 Nm |
| Engine Bore Size | 84 mm | 78.8 mm |
| Engine Stroke Size | 75 mm | 82 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 235 km/hour | 229 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Width | 1790 mm | 1850 mm |
| Fuel Consumption Overall | 10.2 L/100km | 8.6 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
