A Defender Built Around a Coastal Life
Some Defenders are restored to look the part. Arvon was built to live it. Diesel Army’s feature on this one‑of‑one Helderburg D110 soft‑top shows what a 3,000‑hour commission looks like when it’s shaped around a family, a coastline, and a very specific brief.
The story begins in the Hamptons. A husband wanted to surprise his wife with a classic Defender to celebrate their new home by the water. He asked for something mechanical and honest, reminiscent of vintage Porsches, while she envisioned a calm, beautiful space that felt native to coastal life, not a garage‑kept collectible. Helderburg’s role was to merge those worlds into one unmistakable truck.
Heritage Diesel, Engineered for Real Use
Under the hand‑louvered bonnet sits a 2.8‑liter SV Performance turbodiesel paired with a manual gearbox. The focus is sustained torque, drivability, and longevity rather than headline horsepower, which suits soft sand, steep approaches, and long highway runs between the Hamptons and the mountains.
Where many gasoline V8 swaps run hot and thirsty, Arvon’s diesel is tuned for efficiency in the high‑20s to low‑30s mpg and a relaxed powerband that keeps the Defender feeling composed instead of stressed. For diesel enthusiasts, that combination of credibility and restraint is the point.
Cooling and Chassis Built for Sand and Snow
Coastal heat is a weak spot for most soft‑top classics, so Helderburg over‑specified the cooling system. A custom‑machined cylinder head and double‑stack radiator allow Arvon to idle indefinitely in direct summer sun without temperature creep, even with accessories and audio running on the beach.
Beneath the body, full‑time four‑wheel drive, low‑range gearing, and torque‑calibrated brakes with enlarged calipers and stainless braided lines make Arvon as serious in the elements as it is on a promenade. As founder Paul Potratz notes, it was built “to be as comfortable on the sun‑drenched dunes as it is on a frozen mountain pass.”
A Four‑Season Soft‑Top Cabin
Arvon’s High Pearl Metallic Blue exterior frames a cabin that was designed to be used, not tip‑toed around. Sand and Winter White high‑wax leathers were chosen for their natural resistance to moisture and UV, so wet swimsuits, sandy feet, and top‑down drives are an expected part of ownership.
In the rear, four inward‑facing benches turn the Defender’s load bay into a social space, ideal for beach runs with friends, sunset drives, and family days that stretch well past dinner. Insulated soft‑top materials and an integrated preheat system make Arvon a true four‑season soft‑top rather than a summer‑only toy.
Why Arvon Matters
Potratz calls Arvon “the highest expression of what happens when you unite heritage engineering with a family’s personal story,” and the Diesel Army article captures that balance clearly. For diesel enthusiasts, it proves a larger point: a classic Defender doesn’t need to be loud or overbuilt to make a statement.
With the right components, thoughtful engineering, and a clear life it is being built for, a Defender like Arvon becomes something more enduring—a $400,000 coastal tool that feels as if it has always belonged on the dunes and the roads beyond.
