2007 BMW Z4 vs. 2005 BMW 320
To start off, 2007 BMW Z4 is newer by 2 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 2,171 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (168 HP @ 6250 RPM) has 20 more horse power than 2005 BMW 320. (148 HP @ 4000 RPM). In normal driving conditions, 2007 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 361 kg more than 2007 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 120 more torque (in Nm) than 2007 BMW Z4. (210 Nm @ 3500 RPM). This means 2005 BMW 320 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4. 2005 BMW 320 has automatic transmission and 2007 BMW Z4 has manual transmission. 2007 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW 320 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW Z4 | 2005 BMW 320 | |
| Make | BMW | BMW |
| Model | Z4 | 320 |
| Year Released | 2007 | 2005 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2171 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 | 148 HP |
| Engine RPM | 6250 RPM | 4000 RPM |
| Torque | 210 Nm | 330 Nm |
| Torque RPM | 3500 RPM | 2000 RPM |
| Engine Bore Size | 80 mm | 84 mm |
| Engine Stroke Size | 72 mm | 90 mm |
| Engine Compression Ratio | 10.8:1 | 17.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 225 km/hour | 211 km/hour |
| Acceleration 0-100mph | 7.7 seconds | 9.7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1325 kg | 1686 kg |
| Vehicle Length | 4100 mm | 4490 mm |
| Vehicle Width | 1790 mm | 1760 mm |
| Vehicle Height | 1310 mm | 1380 mm |
| Wheelbase Size | 2500 mm | 2730 mm |
| Fuel Consumption Overall | 8.9 L/100km | 6.3 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
