2006 BMW Z4 vs. 2011 BMW 325
To start off, 2011 BMW 325 is newer by 5 year(s). Which means there will be less support and parts availability for 2006 BMW Z4. In addition, the cost of maintenance, including insurance, on 2006 BMW Z4 would be higher. At 2,170 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2011 BMW 325 (217 HP @ 4400 RPM) has 49 more horse power than 2006 BMW Z4. (168 HP @ 6250 RPM) In normal driving conditions, 2011 BMW 325 should accelerate faster than 2006 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, 2011 BMW 325 (450 Nm @ 2500 RPM) has 240 more torque (in Nm) than 2006 BMW Z4. (210 Nm @ 3500 RPM). This means 2011 BMW 325 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 2011 BMW 325 | |
| Make | BMW | BMW |
| Model | Z4 | 325 |
| Year Released | 2006 | 2011 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2170 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 217 HP |
| Engine RPM | 6250 RPM | 4400 RPM |
| Torque | 210 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 2500 RPM |
| Engine Bore Size | 80 mm | 90 mm |
| Engine Stroke Size | 72 mm | 84 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | 6-speed manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Length | 4100 mm | 4624 mm |
| Vehicle Width | 1790 mm | 1811 mm |
| Vehicle Height | 1310 mm | 1384 mm |
| Wheelbase Size | 2500 mm | 2810 mm |
| Fuel Tank Capacity | 55 L | 57 L |
