2007 BMW Convertible vs. 2007 BMW 645
To start off, both 2007 BMW Convertible and 2007 BMW 645 were released in the same year (2007). Therefore the support and the availability on parts for both vehicles should be relatively similar. 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 35 more horse power than 2007 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2007 BMW Convertible should accelerate faster than 2007 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Convertible weights approximately 160 kg more than 2007 BMW 645. 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 40 more torque (in Nm) than 2007 BMW 645. (450 Nm @ 3600 RPM). This means 2007 BMW Convertible will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 645. 2007 BMW 645 has automatic transmission and 2007 BMW Convertible has manual transmission. 2007 BMW Convertible will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW Convertible | 2007 BMW 645 | |
| Make | BMW | BMW |
| Model | Convertible | 645 |
| Year Released | 2007 | 2007 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4799 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 363 HP | 328 HP |
| Engine RPM | 6300 RPM | 6100 RPM |
| Torque | 490 Nm | 450 Nm |
| Torque RPM | 3600 RPM | 3600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 5.7 seconds | 5.6 seconds |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1850 kg | 1690 kg |
| Vehicle Length | 4830 mm | 4830 mm |
| Vehicle Width | 1380 mm | 1860 mm |
| Vehicle Height | 1860 mm | 1380 mm |
| Wheelbase Size | 2790 mm | 2790 mm |
| Fuel Tank Capacity | 70 L | 70 L |
