Ultra-Rare 1970 Plymouth Road Runner Convertible Sells for Record Price

Specifically, the Plymouth found a new home for $162,250, which includes the buyer's premium (the net price was $146,025). The Road Runner changed hands for a whopping $38,500 more than it did just a month before at Mecum's Indy 2025 auction. The new sticker makes it the most expensive non-Hemi 1970 Road Runner Convertible sold at auction.

The B5 Blue drop-top broke a record set back in 2016 by an example finished in FY4 Citron Mist Metallic. The restored and highly original Road Runner sold for $160,000, so the new record is only $2,250 higher.

What makes this Mopar worth well above $100K? Well, for starters, it's a rare classic thanks to the convertible top. 1970 was the second and final year for the drop-top body style. And while 1969 saw nearly 1,900 customers buy one, Plymouth delivered only 658 examples in 1970, which is less than 2% of the total production.

Second, this Road Runner packs a rare powerplant. No, it's not one of the three Hemi-equipped drop-tops sold that year, but the 440-cubic-inch (7.2-liter) Six-Barrel unit is far from common. Of the 658 convertibles produced in 1970, only 34 were equipped with the 390-horsepower big-block V8 engine. Then there's the four-speed manual gearbox, which narrows the production figure to only 20 units.

Although the ad did not mention whether the drivetrain combo was numbers-matching, the sticker pretty much confirms this Road Runner still relies on the factory combo. The vehicle is documented in the Chrysler Registry as a factory V-code rig.

In addition to the rare drivetrain combo, this Road Runner packs desirable options like power steering and power brakes, bucket seats and center console, and a Tic-Toc-Tach. The original owner also selected the solid-state AM radio unit, the power convertible top, and the Air Grabber hood. The Rallye wheels are wrapped in Goodyear Polyglas tires.

The convertible is also a finely restored gem and looks pristine inside and out, as well as under the hood. It's finished in one of the most spectacular color combos of the golden era (B5 Blue over white) and won an award at the Carlisle Mopar Show.

The drop-top is one of four Road Runners auctioned off at Tulsa 2025. A black Six-Barrel coupe sold for $121,000, while a 1969 hardtop with the base 383-cubic-inch (6.3-liter) V8 changed hands for $61,050. Finally, a 1969 hardtop dressed in the special-order and very rare Rallye Green was auctioned off for $57,200.