2007 BMW Z4 vs. 2006 BMW 325
To start off, 2007 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 325. In addition, the cost of maintenance, including insurance, on 2006 BMW 325 would be higher. At 3,001 cc, 2006 BMW 325 is equipped with a bigger engine. In terms of performance, 2006 BMW 325 (215 HP @ 6250 RPM) has 67 more horse power than 2007 BMW Z4. (148 HP @ 6200 RPM) In normal driving conditions, 2006 BMW 325 should accelerate faster than 2007 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 325 weights approximately 540 kg more than 2007 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW 325 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2006 BMW 325 will offer significantly more control. 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 325 (251 Nm @ 2750 RPM) has 51 more torque (in Nm) than 2007 BMW Z4. (200 Nm @ 3600 RPM). This means 2006 BMW 325 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 2007 BMW Z4 | 2006 BMW 325 | |
| Make | BMW | BMW |
| Model | Z4 | 325 |
| Year Released | 2007 | 2006 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 1993 cc | 3001 cc |
| Horse Power | 148 HP | 215 HP |
| Engine RPM | 6200 RPM | 6250 RPM |
| Torque | 200 Nm | 251 Nm |
| Torque RPM | 3600 RPM | 2750 RPM |
| Engine Bore Size | 84 mm | 85.1 mm |
| Engine Stroke Size | 90 mm | 87.9 mm |
| Engine Compression Ratio | 10.5:1 | 10.7:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 220 km/hour | 209 km/hour |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1295 kg | 1835 kg |
| Vehicle Length | 4100 mm | 4530 mm |
| Vehicle Width | 1310 mm | 1820 mm |
| Vehicle Height | 1790 mm | 1420 mm |
| Wheelbase Size | 2500 mm | 2770 mm |
| Fuel Consumption Overall | 7.5 L/100km | 10.7 L/100km |
| Fuel Tank Capacity | 55 L | 67 L |
