2007 BMW Convertible vs. 2004 BMW Z4
To start off, 2007 BMW Convertible is newer by 3 year(s). Which means there will be less support and parts availability for 2004 BMW Z4. In addition, the cost of maintenance, including insurance, on 2004 BMW Z4 would be higher. At 4,797 cc (8 cylinders), 2007 BMW Convertible is equipped with a bigger engine. In terms of performance, 2007 BMW Convertible (362 HP @ 6300 RPM) has 137 more horse power than 2004 BMW Z4. (225 HP @ 5900 RPM). In normal driving conditions, 2007 BMW Convertible should accelerate faster than 2004 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Convertible weights approximately 455 kg more than 2004 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 @ 3900 RPM) has 190 more torque (in Nm) than 2004 BMW Z4. (300 Nm @ 3500 RPM). This means 2007 BMW Convertible will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW Z4.
Compare all specifications:
| 2007 BMW Convertible | 2004 BMW Z4 | |
| Make | BMW | BMW |
| Model | Convertible | Z4 |
| Year Released | 2007 | 2004 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4797 cc | 2983 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 362 HP | 225 HP |
| Engine RPM | 6300 RPM | 5900 RPM |
| Torque | 490 Nm | 300 Nm |
| Torque RPM | 3900 RPM | 3500 RPM |
| Engine Compression Ratio | 10.5:1 | 10.2:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 5.8 seconds | 5.9 seconds |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1850 kg | 1395 kg |
| Vehicle Length | 4830 mm | 4100 mm |
| Vehicle Width | 1380 mm | 1790 mm |
| Vehicle Height | 1860 mm | 1310 mm |
| Wheelbase Size | 2790 mm | 2500 mm |
| Fuel Tank Capacity | 70 L | 55 L |
