2006 BMW Z4 vs. 2005 BMW 320
To start off, 2006 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 BMW 320. In addition, the cost of maintenance, including insurance, on 2005 BMW 320 would be higher. At 2,492 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (189 HP @ 6000 RPM) has 40 more horse power than 2005 BMW 320. (149 HP @ 4000 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2005 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 320 weights approximately 245 kg more 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, 2005 BMW 320 (330 Nm @ 2000 RPM) has 85 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 2005 BMW 320 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 2005 BMW 320 | |
| Make | BMW | BMW |
| Model | Z4 | 320 |
| Year Released | 2006 | 2005 |
| Body Type | Convertible | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 149 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 245 Nm | 330 Nm |
| Torque RPM | 3500 RPM | 2000 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 75 mm | 90 mm |
| Engine Compression Ratio | 11.0:1 | 17.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 235 km/hour | 216 km/hour |
| Acceleration 0-100mph | 7 seconds | 9.2 seconds |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1335 kg | 1580 kg |
| Vehicle Length | 4100 mm | 4480 mm |
| Vehicle Width | 1790 mm | 1750 mm |
| Vehicle Height | 1310 mm | 1420 mm |
| Wheelbase Size | 2500 mm | 2730 mm |
| Fuel Consumption Overall | 9 L/100km | 6 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
