Along with the US debut of the 6 Series Coupe, BMW brings out in New York the all-new 6 Series Convertible. The new 6er convertible makes its US debut this Spring. By the end of this year, the US market will get both the 640i and 650i models.

The entry-level 640i is powered by the N55 TwinScroll turbocharged engine. The engine produces 320 horsepower at 5,800 rpm and 450Nm of torque between 1,300 and 4,500 rpm. The 640i Convertible weighs 1,840 kilograms, but still manages to run from 0 100 km/h in 5.7 seconds.

BMW’s top model 650i is powered by the twin-turbo 4.4-liter direct injection V8. The engine produces 400 horsepower from 5500 to 6400 rpm.

While it is impressive that peak power is maintained for 900 rpm, the even more impressive feet may be sustaining the peak torque of 450 pound-feet from a lowly 1750 rpm all the way up 4500 rpm. Equipped with either the manual or the torque-converter automatic, the 6 is rated with a 0-to-60 time of 4.9 seconds and limited top speed of 155 mph.

BMW has kept the E64′s automated soft top for the F13. We welcome back the soft top for its classic, timeless look, lightweight design, and excellent trunk space when stowed.

The fabric top was made esthetically possible thanks to the ‘fins’, the buttress supports on either side of the roof, that allowed it to be a ‘fast’ shape. The soft top then can follow the same shape as the coupe. The top is constructed of multiple layers of fabric and is said to be quite quiet in operation. There is also a classical elegance to the top being constructed of fabric.

The 6er has a purposeful resemblance to the 7 and 5 Series. Earlier this year, Adrian van Hooydonk, BMW Chief Designer, explained that the car has been lengthened and widen from the previous 6. This has allowed for a more optimal rear seat back angle and sightly more commodious accommodations.

There are two lines that sweep from the front of the car back. One at the shoulder line and one that runs from the chrome jewelry in the fender back through the door handles and onto the rear fenders (and is visually reminiscent of the line on the 7 Series).

The stunning, all-new 2012 BMW 650i Convertible will start at $91,375, pricing for the 640i will be announced at market launch.