The Power of Four: Mulliner's Most Personal Batur Convertible Ever Created

Some automobiles are designed.
Others are curated.

With Batur Convertible #4, Mulliner elevates bespoke coachbuilding into something far more intimate - a deeply collaborative, emotionally charged expression of ownership that redefines what modern luxury can be. This is not simply the most highly curated Batur Convertible to date. It is a manifesto of personal vision, realised without compromise.

Commissioned by visionary collector Sonia Breslow, this one-of-one creation represents the fourth chapter in a remarkable Mulliner journey - joining a rare stable that includes a Blower Continuation Series, a Speed Six Continuation Series, and the first modern-era coachbuilt Bentley, the Bacalar. Explore more about Bentley's motorsport turned luxury heritage.

Co-Creation as Craft: When the Client Becomes the Designer

At the heart of Batur Convertible #4 lies an idea Mulliner understands better than anyone else - true luxury today is not about choice, but authorship.

Sonia Breslow is not a passive buyer. She is a co-creator. Every surface, shade, and finish has been personally considered, resulting in what Mulliner describes as its most luxurious commission to date.

"When I have a car like this Batur, I don't plan on selling it in my lifetime - it's my forever car," she says.
"I'm totally into the detail. Picking colours, working through every shade, every feature - making them different from everything else."

That philosophy defines the soul of this car and exemplifies how one defines luxury today.

The Power of Four: Four World-First Expressions of Bespoke

Batur Convertible #4 introduces four new possibilities never before seen on a Mulliner commission:

• The first tri-tone exterior using a client's own commissioned colours, unified by a razor-precise 6 mm gloss silver fine line that accentuates the Batur's dramatic "endless bonnet" design
• The first fully colour-matched bespoke convertible roof, finished in 'Breslow Blue' and perfectly aligned with the Airbridge beneath when stowed
• The first client-designed animated welcome lamp, projecting a handwritten signature using over 415,800 microscopic mirrors
• The first application of Bentley's three-dimensional printed platinum, used for the steering wheel's top-dead-centre marker and the iconic organ stops

Each innovation is subtle. None are theatrical. All are deeply personal.

Exterior Curation: Breslow Blue in Motion

The exterior is a masterclass in colour cohesion and restraint.

The bespoke tri-tone palette is anchored by 'Breslow Blue' - a hue commissioned exclusively for this car. A deeper 'Midnight Breslow Blue' appears as a bonnet pinstripe, visually grounding the composition while reinforcing continuity across surfaces.

Details extend with deliberate precision: accented wheels and wing mirrors, polished titanium exhaust finishers, and bright silver grilles that lend a contemporary sharpness to the car's sculptural form.

When the roof is stowed, the colour-matched Airbridge reveals itself in full view - an elegant reward for those who understand the language of detail.

A Cabin That Tells a Personal Story

Inside, Batur Convertible #4 moves away from high-contrast drama toward something warmer, richer, and quietly indulgent.

Autumnal tones dominate - tans, caramel hues, and soft neutrals - offset by subtle light blue accents that echo the Breslow Blue exterior and draw the Airbridge colour directly into the cabin.

Contrast stitching flows seamlessly from the tonneau to the seats, headrests, and instrument panel. Even the contours of the Batur volcano - the car's namesake - are delicately woven into the deep-pile floor mats, a nod to heritage hidden in plain sight.

The animated welcome lamp transforms entry into ritual, projecting the owner's handwritten name in light - one of the most personal gestures ever executed by Mulliner.

Metal, Memory, and Modern Craft

Taking inspiration from early Bentleys, a bright aluminium engine spin finish defines the cabin fascia, pairing heritage aesthetics with modern execution.

The Bentley Rotating Display features bespoke coloured gauge faces, harmonised with a satin blue Bentley clock face. Yet the true statement lies in the metal details: Bentley's first-ever use of three-dimensional printed platinum.

The precious metal appears sparingly but symbolically - on the steering wheel's centre marker and the organ stops - a quiet declaration of rarity, innovation, and permanence.

The Final W12, Unfiltered

Despite its couture-level detailing, the Batur Convertible remains unapologetically powerful.

At its core lies Bentley's most potent expression of the legendary W12 - a hand-assembled 6.0-litre twin-turbocharged engine producing approximately 740 bhp. It is grand touring in its purest form - effortless, commanding, and emotionally resonant.

As the W12 approaches the end of its production life, Batur Convertible #4 stands as both celebration and farewell - a mechanical legacy wrapped in bespoke artistry.

A Masterclass in Modern Coachbuilding

Batur Convertible #4 is more than Mulliner's most luxurious commission to date. It is proof that the future of exclusivity lies not in limitation, but in collaboration.

Powerful yet elegant. Personal yet timeless.
This is what happens when a collector's vision meets a coachbuilder with no creative boundaries.

The Batur Convertible exemplifies the pinnacle of automotive bespoke luxury, joining an elite collection of luxury cars to die for. For those fascinated by automotive excellence, explore the top luxury cars that continue to define the industry.

This level of personalization reflects a broader trend in ultra-luxury automotive design, where collectors increasingly seek unique expressions of identity. Similar approaches can be seen in other prestigious marques including the Rolls Royce Blue Boat Tail, Bugatti's sophisticated Mistral tribute, and Aston Martin's inspiring heritage.

The world of bespoke automotive luxury extends beyond British craftsmanship to include German engineering excellence from BMW's German legacy, Maybach's distinguished dynasty, and Mercedes-Benz's storied history. Italian performance is represented by Lamborghini's Temerario engineering brilliance.

Understanding the philosophy behind such commissions requires appreciating the evolution of luxury and recognizing that modern luxury is defined by personal expression rather than mass appeal. This approach to bespoke creation mirrors the philosophy found in sustainable luxury practices, where longevity and meaning triumph over temporary trends.