THE latest version of Bentley's luxurious Continental GT Convertible will have you in stitches - nearly 400,000 of them, in fact.

That's the number of stitches applied to divide the car's soft leather interior into dozens of small diamond shapes - each needing precisely 712 stitches. The embroidery process to perform this task took 18 months to develop.

The special interior appears as part of what Bentley is calling "the luxury pinnacle of the Continental GT family, the Continental GT Mulliner Convertible".

Bentley isn't saying how much this newcomer will cost - but it's sure to be distinctly more than the entry level car to the Continental GT Convertible range, which costs a cool £176,000.

The Continental GT Mulliner is the first member of the new Collections portfolio introduced by Bentley Mulliner.

Grand Black walnut veneer is standard, while a new extensive range of 88 different piano-finished wood veneers is available through Bentley Mulliner Personal Commissioning.

Customers can specify a contemporary, colourised veneer finish that can be matched to the interior or exterior of the car. Burr walnut veneer is hand sanded and polished to produce a perfectly smooth finish before painting to match the colour of the customer's choice. Once dry, the veneer is polished to achieve a mirror-like finish.

Taking pride of position between the cut-crystal inspired, precision-made headlamps, Bentley Mulliner introduces a bold new Double Diamond front grille, which is further complemented by bespoke Mulliner-branded side vents that continue the unique silver-on-black diamond theme.

Furnishing the sleek and muscular profile of the Continental GT Mulliner Convertible, the all-new 22ins 10-spoke painted and polished wheels have floating, self-levelling wheel badges that remain upright as the wheel rotates.

The Continental GT Mulliner Convertible is available with the top of the range Naim for Bentley audio system. The state of the art setup features 18 speakers and two active bass transducers driven by a 2,200âwatt, 20-channel amplifier and eight DSP sound modes with activebass.

Customers of the Continental GT Mulliner Convertible will receive their keys in a Mulliner-branded handcrafted presentation box, which matches the three-colour interior configuration of the car. The two keys are provided in similarly colour-matched leather cases with contrast stitching.

The Continental GT Mulliner Convertible will be available with Bentley's V8 and W12 powertrains. When equipped with Bentley's 6.0-litre, twin-turbocharged W12, the Continental GT Mulliner Convertible accelerates from 0-60 mph in 3.7 seconds and is capable of a top speed of 207 mph. The new-generation 4.0-litre, twinâturbocharged V8 delivers a top speed of 198 mph and 0â60mph in 4.0 seconds.