2006 BMW Z4 vs. 2007 BMW 320
To start off, 2007 BMW 320 is newer by 1 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 2,492 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (189 HP @ 6000 RPM) has 41 more horse power than 2007 BMW 320. (148 HP @ 6200 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2007 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 320 weights approximately 60 kg more than 2006 BMW Z4.
Let's talk about torque, 2006 BMW Z4 (245 Nm @ 3500 RPM) has 45 more torque (in Nm) than 2007 BMW 320. (200 Nm @ 3600 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 320.
Compare all specifications:
| 2006 BMW Z4 | 2007 BMW 320 | |
| Make | BMW | BMW |
| Model | Z4 | 320 |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2492 cc | 1994 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 148 HP |
| Engine RPM | 6000 RPM | 6200 RPM |
| Torque | 245 Nm | 200 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 75 mm | 90 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 235 km/hour | 220 km/hour |
| Acceleration 0-100mph | 7 seconds | 9 seconds |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1335 kg | 1395 kg |
| Vehicle Length | 4100 mm | 4530 mm |
| Vehicle Width | 1790 mm | 1430 mm |
| Vehicle Height | 1310 mm | 1880 mm |
| Wheelbase Size | 2500 mm | 2770 mm |
| Fuel Consumption Overall | 9 L/100km | 7.4 L/100km |
| Fuel Tank Capacity | 55 L | 60 L |
