2006 BMW Z4 vs. 2007 BMW Convertible
To start off, 2007 BMW Convertible 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 4,799 cc (8 cylinders), 2007 BMW Convertible is equipped with a bigger engine. In terms of performance, 2007 BMW Convertible (363 HP @ 6300 RPM) has 25 more horse power than 2006 BMW Z4. (338 HP @ 7900 RPM) In normal driving conditions, 2007 BMW Convertible should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Convertible weights approximately 365 kg more than 2006 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2007 BMW Convertible (490 Nm @ 3600 RPM) has 125 more torque (in Nm) than 2006 BMW Z4. (365 Nm @ 4900 RPM). This means 2007 BMW Convertible will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 2007 BMW Convertible | |
| Make | BMW | BMW |
| Model | Z4 | Convertible |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3246 cc | 4799 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 363 HP |
| Engine RPM | 7900 RPM | 6300 RPM |
| Torque | 365 Nm | 490 Nm |
| Torque RPM | 4900 RPM | 3600 RPM |
| Engine Compression Ratio | 11.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 245 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5 seconds | 5.7 seconds |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1485 kg | 1850 kg |
| Vehicle Length | 4120 mm | 4830 mm |
| Vehicle Width | 1790 mm | 1380 mm |
| Vehicle Height | 1310 mm | 1860 mm |
| Wheelbase Size | 2500 mm | 2790 mm |
| Fuel Tank Capacity | 55 L | 70 L |
