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1973 Plymouth Road Runner

The '73 Road Runner: a muscle car legend mellowing out! Still cool, but less aggressive than its predecessors. It marked a shift in the muscle car era, reflecting changing times and fuel crises. Think classic, boxy lines and that iconic beak—a bit gentler, but still undeniably a Road Runner.

History of the Plymouth Road Runner

A Glorious Arrival (1968–1970)

The Plymouth Road Runner made its grand entrance in 1968, conceived as the quintessential muscle car—affordable yet powerful. It rapidly captured the imagination of speed enthusiasts, with production numbers soaring to over 84,000 units in 1969 alone. The muscle under the hood was no small matter either, with options ranging from the impressive 383 cubic inch V8 to the legendary 426 Hemi.

Navigating the '70s (1971–1974)

The '70s saw the Road Runner don a new facade reflecting the era's design trends, such as the "fuselage" style in 1971. As emissions regulations tightened, engine offerings shifted to more efficient but still assertive options like the 318 and the stout 400 cubic inch V8. Despite these changes, the car maintained its ground, albeit slowing slightly from its muscle-bound origins.

Photo of a 1973 Plymouth Road Runner

1973 Plymouth Road Runner Models:

Select the vehicle's model to see the correct data for it.

How Much is Plymouth Road Runner Worth?

Original MSRP :$3,010.00

Outstanding

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$38,700

Clean

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$28,700

Average

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$19,300*

Rough

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$13,800

1973 Plymouth Road Runner Specs

Body Maker: Plymouth
No. Of Doors: 2
Model Number: RM23
Length: 210.8 inches
Width: 79.1 inches
Height: 52.5 inches
Wheelbase: 115 inches
Type: Own, V8, OHV, Dual downdraft, Fully synchronized
Displacement: 317.58 cu. in.
Cylinders: 8
Bore And Stroke: 3 29/32 & 3 5/16 inches
Compression Ratio Standard: 8.6 to 1
Horsepower Brake: 150@3600
Horsepower Rated: 48.83
Torque: 265@2000
Main Bearings: 5
Valve Lifters: Hydraulic
Block Material: Cast Iron
Engine Number Location: Stamped on front of block just below left cylinder head.
Lubrication: Pressure to all bearings excluding wrist pin
Carburetor Make: Carter
Type:
4.75 Pints
Drive:
Rear wheel drive
Clutch Type:
Single plate dry disc
Clutch Size:
10.5 inches
Gear Ratios:
3
Gear Ratios First:
3.08
Gear Ratios Second:
1.7
Gear Ratios Third:
1 to 1
Gear Ratios Fourth:
Not applicable
Gear Ratios Fifth:
Not applicable
Gear Ratios Reverse:
2.9
Type: Semifloating
Differential Type: Hypoid
Differential Ratio: 2.94 to 1
Front: Independent torsion bar
Rear: Leaf springs
Service Type: Front disc, rear self-adjusting drum
Service Front Size: 10.84 inches
Service Rear Size: 11 inches
Emergency Type: Rear service brakes
Emergency Size: 11 inches
Type: Regular
Tire Size: F70 x 14
Spare Location: Trunk
Fuel: 19 Gallons
Oil: 4 Quarts
Rear Differential: 4.4 Pints
Front Differential: Not applicable
Transfer Case: Not applicable
Serial Number:Starting RM23G3a100001
Total Digits:13
Digits 1-2:Series
Digits 3-4:Body style
Digits 5:Engine
Digits 6:Model year
Digits 7:Assembly plant
Digits 8-13:Production number
All colors may not be available in all models., Silver Frost Metallic, Blue Sky, True Blue Metallic, Mist Green, Amber Sherwood Metallic, Forest Green Metallic, Sahara Beige, Coral Turquoise Metallic, Chestnut Metallic, Spinnaker White, Formal Black, Sun Fire Yellow, Honey Gold, Golden Haze Metallic, Tahitian Gold Metallic, Basin Street Blue, Rallye Red, Autumn Bronze Metallic, Tor-Red, Lemon Twist
Coupe: Opt
Air Conditioning: Opt
Power Brakes: Opt
Power Steering: Opt
Radio: Opt

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Famous Figures Who Own the Road Runner

From Hollywood to the music stage, the Plymouth Road Runner has been a star-studded ride for many celebs. Tom Cruise, Kelsey Grammer, and even musician Justin Timberlake have roared around town in this classic. You might say owning a Road Runner was almost like having a backstage pass to eras gone by.

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Fun Facts About the Road Runner

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    Cultural Icon: It wasn't just a car but a pop culture phenomenon. TV shows and movies like The Dukes of Hazzard and Vanishing Point featured its sleek lines and roaring engines.

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    Plymouth Branding: Ever notice the cartoon-like character association? That's no accident—clever marketing merged the fun and power of the car with a catchy Road Runner cartoon theme.

Interested in Buying or Selling a Classic Car?

When it comes to buying or selling a classic muscle car like the Road Runner, knowing the full story is crucial. Here's why a vehicle history report and a car build sheet are your best friends:

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1973 Plymouth Road Runner Gallery

Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner
Photo of a 1973 Plymouth Road Runner

Pop Culture and Enduring Legacy

Carrying forward the iconic status, the Road Runner became more than just metal and rubber. It stood as a companion in the cultural narrative, drawing eyes on the silver screen and in reality with celebrity owners. Its role in reflecting the changing tides of the automotive world is as significant today as it was in the turbulent times of the '70s.

Why not try a next time you need to add a classic to your garage? Or if it's one of those unique vehicles, maybe a can help sort out those details. And hey, if you ever find yourself puzzled with unusual VINs, there are always tools like a or even a handy .

The legacy of the Road Runner is an open road that continues to stretch on, drawing enthusiasts who appreciate not just cars, but the cultural and emotional history they carry. So, are you ready to join this journey of nostalgia and horsepower?

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Explore Plymouth Road Runner from Other Years

Frequently Asked Questions

Well, let's see. Spotting a '73 Road Runner? It's pretty distinctive, you know? Think of it like this: it's got that iconic long hood, short deck profile—a real head-turner. But beyond the cool looks, pay close attention to the details. The grille is unique to that year, a bit more squared off than earlier models; and the taillights, ah, those are unmistakable. They're a definite giveaway. Also, the side stripes, a classic Road Runner feature, can vary; they're a good way to pinpoint the exact trim level if you're into that sort of thing. Basically, it's the little things that really set it apart from other Mopars of the era. So, keep your eyes peeled for those details!

Okay, so the engine choices in 1973? It wasn't as crazy as earlier years, that's for sure; those were the gas-guzzling days, you know? But they still offered a range of V8s. You had your basic 318, a solid performer. Then you'd step up to the 340, a bit more muscle under the hood. And of course, the top dog was the 440. That one was a real beast! Now, keep in mind, horsepower ratings were changing because of emissions; it wasn't quite the same raw power as earlier models. They were trying to make them more fuel-efficient. It's a bit of a bummer, but that’s how things were in the early '70s. So, yeah, three solid V8 choices but power was a little toned down compared to what you'd find in say, '69.

Generally speaking, you'd find a three-speed automatic transmission as a common pairing with those big V8s. Think of it as the go-to choice for most buyers, perfect for cruising. However, some folks went for the four-speed manual; those were for folks who really wanted to engage the driving experience. Now a four-speed on a 440 is something else. Those were serious muscle car enthusiasts! So it just depends on what you wanted and if you were prepared to wrestle that beast of a car.

That's a tricky one; values fluctuate like crazy, you know? A pristine, numbers-matching example, it'll fetch a pretty penny, maybe even a small fortune. But if it's been heavily modified, needs some serious work, or some parts are missing, that'll bring down the value. Options play a part too; a 440 six-pack car? Forget about it; those things are valuable. Think of it like buying a house: location, location, location; in cars, it's condition, condition, condition. So do your research! Get a reliable appraisal before buying anything; it saves you a headache in the long run.

Oh boy, where do I even begin? Rust is a big one—especially in areas that aren't well-protected. Finding replacement parts can also be a nightmare; it's not like they're easy to come by; many parts are getting scarce. But that's just the beginning; there's the mechanical side too, where you might have issues with the carburetor, fuel system, or even the engine itself. So it's not exactly a walk in the park, but if you have the time and money, it is very rewarding.