The Rarest Dodge Muscle Car Ever Built: Only Two Exist

If you’ve been deep in the Mopar game long enough, you know that some cars just hit different. Not because they had the flashiest decals or the most TV screen time—but because they’re so stupidly rare that even diehard Dodge fanatics half-believe they’re just a myth. For me, that car is the 1970 Dodge Coronet R/T Hemi Convertible. And let me tell ya, when I first heard about it, I thought it was just bench-racing folklore.

I grew up worshiping at the altar of big-block B-bodies. Heck, I’ve spent more hours twisting wrenches on 440 Magnums than I have actually driving anything sensible. But when the conversation turns to the rarest of the rare, there’s one Mopar that makes even a Hemi ‘Cuda convertible look almost common. Dodge built exactly two of these Coronet R/T Hemi drop-tops. Not a typo—two. That’s fewer than the number of fingers I need to count ‘em.

Back in 1970, the horsepower wars were redlining. Dodge was throwing big-bore V8s into everything with wheels, and the Coronet lineup was already no slouch. The R/T trim meant business: chunky stance, aggressive hood, and enough torque to twist the pavement into pretzels. But when someone at Dodge checked the “426 Hemi” box and the “convertible” box on the same order form, they essentially created a vehicular unicorn. The 426 Hemi was already a pricey, race-bred beast that guzzled premium fuel and demanded constant love. Sticking it into a convertible—with all that extra weight and flex—was borderline bonkers. And yet, that’s exactly why we gearheads can’t stop drooling over it.

Let me break down the numbers for you. Factory rating? 425 horsepower and 490 lb-ft of torque. But any Mopar nut worth his salt knows those figures were sandbagged for insurance purposes. Realistically, that elephant motor was belting out north of 500 ponies through those big tube headers. Quarter-mile times? Back then, testers were clocking mid-13-second passes. In a heavy convertible, mind you. With the roof chopped off and that massive iron lump up front, the Coronet R/T Hemi Convertible was still a genuine 13-second street bruiser. The shove off the line must have felt like God’s own right foot.

Now, here’s where it gets juicy. In 2026, the collector car market has gone completely bananas. Hagerty’s current valuation tool—updated for this year—places a #1 condition 1970 Coronet R/T Hemi Convertible at a cool $1.45 million. Yeah, you read that right. Back in the early 2020s it was hovering around $1.3 million, but with inflation and the mania for top-tier Mopar iron, the ceiling keeps climbing. When only two cars exist, you’re not just buying a classic—you’re buying a piece of muscle car history that practically nobody else can own. It’s the golden ticket, the Willy Wonka factory tour on four wheels.

So why did Dodge stop after just two? Simple: nobody wanted to pay the sky-high premium. The Hemi option alone added thousands of dollars—a king’s ransom in 1970. Meanwhile, the 440 Magnum was cheaper, nearly as quick on the street, and a whole lot more civilized for cruising. Plus, insurance companies were cracking down hard on high-output engines. Telling your agent you just bought a Hemi convertible was basically asking for a rate hike that could bankrupt a small family. And let’s be real, by 1970, convertibles were losing their luster anyway. Hardtops were the new cool kids, and the Charger and Challenger were stealing all the limelight. The poor Coronet was left holding the bag, and the Hemi convertible just faded into obscurity.

The styling, though? Pure, unadulterated attitude. That split front grille looks like a pair of jet intakes ready to swallow the highway. Add the R/T badges, the functional hood scoop, and the rumble of a Hemi at idle—an sound that’s equal parts thunder and mechanical menace—and you’ve got a car that can’t be mistaken for anything else. Even parked, it looks like it’s doing 60 mph. Dodge’s design team was just showing off at that point.

I’ve had the privilege of crawling around a fully restored example at a private collection a few years back, and let me tell you—it’s surreal. The attention to detail in that restoration was fanatical. Every nut and bolt matched the build sheet. Sitting behind the wheel, you realize this car wears its rarity like a badge of honor. The bucket seats, the pistol-grip shifter, the simplicity of an era when driving was an event. And just knowing you’re staring at one of only two on the entire planet? That hits different.

Interestingly, there’s another two-of-two Hemi Coronet that most folks forget about. In 1966, Dodge squeezed the 426 Hemi into a four-door Coronet sedan. Yeah, a freakin’ family hauler with a legendary race engine. Those were also built in excruciatingly low numbers—just two—as ordered by drag racers or dealership insiders who knew the loophole. It’s the ultimate sleeper, and in today’s market it’s appreciated massively. But the 1970 convertible remains the crown jewel because it marries open-air freedom with the Hemi’s animalistic fury.

These cars don’t pop up at public auctions often. When they do, the entire hobby stops and stares. The last major sale I recall was a private deal a few years back, and even then the numbers thrown around were astronomical. Most of the time, these Coronets live in climate-controlled garages, shut away from the world like the automotive unicorns they are. That’s part of the mystique—you’re more likely to spot Bigfoot cruising Main Street than to see a Hemi Coronet convertible at a local car show.

In the end, what makes this Dodge so special isn’t just the horsepower or the rarity. It’s the sheer audacity of its existence. In an era when corporate bean counters were starting to kill off the fun, Dodge said, “Let’s build a ragtop with the craziest engine we’ve got, even if nobody buys it.” And they did. Twice. That’s a flex for the ages. The 1970 Coronet R/T Hemi Convertible might not have been a sales success, but in 2026, it’s the absolute king of the muscle car world—and I’m just glad it actually exists.

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