2013 BMW 6 series Coupe 640i vs. 2013 BMW 6 series Convertible 650i xDrive
To start off, both 2013 BMW 6 series Coupe 640i and 2013 BMW 6 series Convertible 650i xDrive were released in the same year (2013). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,395 cc (8 cylinders), 2013 BMW 6 series Convertible 650i xDrive is equipped with a bigger engine. In terms of performance, 2013 BMW 6 series Convertible 650i xDrive (437 HP @ 5500 RPM) has 126 more horse power than 2013 BMW 6 series Coupe 640i. (311 HP @ 6000 RPM) In normal driving conditions, 2013 BMW 6 series Convertible 650i xDrive should accelerate faster than 2013 BMW 6 series Coupe 640i. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 6 series Convertible 650i xDrive weights approximately 185 kg more than 2013 BMW 6 series Coupe 640i. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2013 BMW 6 series Convertible 650i xDrive is all wheel drive (AWD), it will have significant more traction and grip than 2013 BMW 6 series Coupe 640i. In wet, icy, snow, or gravel driving conditions, 2013 BMW 6 series Convertible 650i xDrive will offer significantly more control. 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, 2013 BMW 6 series Convertible 650i xDrive (649 Nm @ 4500 RPM) has 202 more torque (in Nm) than 2013 BMW 6 series Coupe 640i. (447 Nm @ 4500 RPM). This means 2013 BMW 6 series Convertible 650i xDrive will have an easier job in driving up hills or pulling heavy equipment than 2013 BMW 6 series Coupe 640i.
Compare all specifications:
| 2013 BMW 6 series Coupe 640i | 2013 BMW 6 series Convertible 650i xDrive | |
| Make | BMW | BMW |
| Model | 6 series | 6 series |
| Year Released | 2013 | 2013 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 4395 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 311 HP | 437 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 447 Nm | 649 Nm |
| Torque RPM | 4500 RPM | 4500 RPM |
| Engine Bore Size | 84 mm | 89 mm |
| Engine Stroke Size | 89 mm | 88 mm |
| Engine Compression Ratio | 10.2 :1 | 10.0 :1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.3 seconds | 4.4 seconds |
| Drive Type | Rear | AWD |
| Transmission Type | 8-speed automatic | 8-speed automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1815 kg | 2000 kg |
| Vehicle Length | 4897 mm | 4896 mm |
| Vehicle Width | 1895 mm | 2081 mm |
| Vehicle Height | 1369 mm | 1369 mm |
| Wheelbase Size | 2856 mm | 2855 mm |
| Fuel Tank Capacity | 70 L | 70 L |
