2009 BMW Z4 vs. 2007 BMW 323
To start off, 2009 BMW Z4 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW 323. In addition, the cost of maintenance, including insurance, on 2007 BMW 323 would be higher. At 2,996 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (335 HP @ 7900 RPM) has 159 more horse power than 2007 BMW 323. (176 HP @ 6200 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2007 BMW 323. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 323 weights approximately 210 kg more than 2009 BMW Z4.
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, 2009 BMW Z4 (315 Nm @ 2750 RPM) has 85 more torque (in Nm) than 2007 BMW 323. (230 Nm @ 3600 RPM). This means 2009 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 323.
Compare all specifications:
| 2009 BMW Z4 | 2007 BMW 323 | |
| Make | BMW | BMW |
| Model | Z4 | 323 |
| Year Released | 2009 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 2497 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 335 HP | 176 HP |
| Engine RPM | 7900 RPM | 6200 RPM |
| Torque | 315 Nm | 230 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Compression Ratio | 12.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1310 kg | 1520 kg |
| Vehicle Length | 4100 mm | 4530 mm |
| Vehicle Width | 1790 mm | 1430 mm |
| Vehicle Height | 1310 mm | 1820 mm |
| Wheelbase Size | 2500 mm | 2770 mm |
| Fuel Consumption Overall | 9.7 L/100km | 7.5 L/100km |
| Fuel Tank Capacity | 55 L | 60 L |
