$393,000 Helderburg Land Rover Defender D110: Blending Beach-Town Style With Trail-Ready Hardware

Some classic Land Rover Defenders get restored. Others get reinvented. Arvon, a one-of-one D110 soft-top built by Arkansas-based Helderburg, feels like something else entirely. It’s a diesel-powered custom with real emotional weight behind it, executed with the kind of detail and engineering that puts it well beyond a typical vintage 4×4 rebuild.

More than 3,000 hours went into this Defender D110. The project started as a husband’s surprise gift to mark a new home in the Hamptons, then evolved into a shared vision. He wanted something analog, mechanical, and honest—something with the character of a vintage Porsche. She wanted a space that felt calm, beautiful, and naturally suited to coastal living. Helderburg’s job was to bring both perspectives together in a single Defender without losing what makes the platform special in the first place.

Diesel Power That Fits The Platform

Pop the custom hood, complete with hand-cut bonnet louvers, and you’ll find a 2.8-liter SV Performance turbodiesel paired with a manual gearbox. For enthusiasts, that’s where Arvon really starts to make sense. This wasn’t a build centered around big horsepower claims or shock value. The focus was on the stuff that actually matters in a vehicle like this: usable torque, long-haul drivability, durability, and a hands-on driving experience.

That low-end torque is exactly what you want in a Defender D110, especially one expected to deal with soft sand, steep approaches, and long highway miles between the Hamptons and the mountains. Compared with a lot of gasoline V8 swaps, which can be thirstier and harder to keep cool, the turbodiesel feels more in line with the truck’s mission. Helderburg says Arvon delivers mileage in the high-20s to low-30s mpg range, along with a broad, relaxed powerband that keeps the truck feeling composed instead of overworked.

Cooling was clearly a priority, too. Coastal life can be brutal on old trucks, especially when they’re left idling in summer heat, and Helderburg addressed that head-on. A custom-machined cylinder head and double-stack radiator allow Arvon to sit in direct sun without the temperature starting to creep. Whether it’s idling on the dunes with the music on or crawling through slower terrain, that kind of thermal control adds real confidence.

More Than A Beach Cruiser

Arvon may look perfectly suited to beach-town duty, but it wasn’t built as a fragile statement piece. Underneath, it still carries the hardware that gives a Defender its reputation. Full-time four-wheel drive and stout low-range gearing give it the kind of real-world versatility you want once the pavement disappears. Helderburg also upgraded the braking system with torque-calibrated brakes, enlarged calipers, and stainless braided lines, helping preserve solid, predictable pedal feel even in soft sand.

Founder Paul Potratz says the goal was to make Arvon as comfortable on “the sun-drenched dunes” as it is on “a frozen mountain pass,” and the build backs that up. Unlike a lot of soft-top Defenders, this one was designed as a genuine four-season truck, complete with insulated soft-top materials and an integrated preheat system for cold-weather starts.

A Cabin Built To Be Used

Inside the High Pearl Metallic Blue Defender D110, the Sand and Winter White high-wax leathers do more than elevate the truck visually. They were also chosen for practical reasons, with natural resistance to moisture and UV exposure—both of which matter in a vehicle built for open-air coastal use. Wet swimsuits, salt air, and top-down driving aren’t afterthoughts here. They’re part of the design brief.

Out back, four inward-facing rear benches turn the rear compartment into a social space, giving the truck that classic Defender sense of occasion. It’s easy to picture it loaded with friends and family for a beach run, but the layout still feels true to the vehicle’s heritage rather than staged for show. That’s part of what makes Arvon work. It captures the nostalgia people want from an old Land Rover, while delivering a level of finish and solidity that feels fully modern.

Potratz describes Arvon as “the highest expression of what happens when you unite heritage engineering with a family’s personal story.” That feels fair, but the truck also makes another point. For diesel fans and off-road enthusiasts, Arvon is proof that a classic Defender D110 doesn’t need to be oversized, overbuilt, or obnoxious to make an impression. With the right engineering and a clear vision, it can be deeply personal and genuinely capable at the same time. Then again, the real question may be how hard you’d actually want to wheel something this beautiful.