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What Was The First Muscle Car?

first muscle car

Before we establish what the first muscle car was, we need to define what a muscle car is. The classic American muscle car was a regular production vehicle marketed to be a factory high-performance car. Primarily designed for straight-line speed, these cars lacked sophisticated chassis, brakes, and suspension, but were durable, affordable, and fast. The most agreed upon definition, is that they were intermediate-sized cars, no more than a 118" wheelbase, and powered by a V8 engine displacing 300 cubic-inches or more. If the above definition is valid, it rules out the 1955 Chrysler 300, which weighed over 4,000 pounds, the 283ci 1957 Chevy, and the full-size 1962 Chevy 409.

Oldsmobile Rocket V8

In 1949, Oldsmobile debuted their "Rocket V8" engine. The 303ci overhead-valve motor featured a forged steel crankshaft, aluminum pistons with floating wrist-pins, and a dual-plane intake manifold, producing 135 horsepower and 263 pound-feet of torque. The over-square design had a bore of 3.75" and stroke of 3.438".

many consider the Oldsmobile Rocket 88 as the first muscle car

Once the Rocket V8 engine was placed inside Oldsmobile's lighter-bodied 76-series cars, the Rocket 88 series began, marking the first time a larger-than 300ci engine was installed in a mid-size car. Tha Rocket 88 won at Daytona Speed Weeks, the 2,100-plus mile Carrera Panamericana, and dominated NASCAR's Grand National series for several years. The Olds 303ci engine was produced from 1949 until 1953, subsequently getting larger and more powerful.

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Following the timeline of post-WW2 America, the late fifties and early sixties brought about new outlets for car performance, such as NASCAR oval tracks, Speed Trials at Florida's Daytona Beach, and straight-line acceleration runs at NHRA drag strips.

1957 Rambler Rebel

The Rambler Rebel debuted as a special model showcasing a new V8 engine for the 1957 model year. Not to be confused with the popular Chevy V8 produced from 1962 to 1968, Rambler's new 327ci engine featured 9.5:1 compression ratio, a four-barrel carburetor, and produced 255 horsepower. Placed in the mid-size Rebel body, it gave a power-to-weight ratio of 13:1.

first muscle car

At Daytona Speed Week in February 1957, a Rambler Rebel ran 0-60 in 7.2 seconds. The only car faster was a fuel-injected Corvette, at 7.0 seconds.


Starting in the early sixties, both Ford and Dodge were building cars specifically to compete at the drag strip.

When fitted with a 413ci Max Wedge engine, the compact Dodge Dart dominated drag strips, with 13-second ETs at over 100 mph. Often described as a street legal race car, it was not widely advertised, and production numbers were very low.

1964 Ford Thunderbolt

The 1964 Ford Thunderbolt was based on the mid-size Fairlane body, with all comfort features removed. This included sun visors, outside mirror, sound-deadener, armrests, jack and lug wrench - all omitted to save weight. A fiberglass front bumper was used on the front and a steel bumper remained on the rear. Side glass windows were substituted with lightweight plexiglass. Total weight for the Thunderbolt was 3203 pounds, which was about 20 pounds heavier than the minimum weight for NHRA super stock racing in 1964.

Under the hood, a 427ci engine with 12.7:1 compression,featured two four-barrel carburetors and a special intake manifold and camshaft. Air was fed into the engine through two hoses connected to unused headlamp entrances in the grille.

some consider the Ford Thunderbolt as the first muscle car

Straight off the dealer lot, the Thunderbolt could run the quarter-mile in under 12 seconds at over 120 mph. Factory records indicate the first 11 cars were maroon, and the next 100 were white, making a grand total of 111 Thunderbolts built. About half were equipped with a 4-speed-transmission.

A similarly-equipped Mercury Comet also featured the 427 Ford FE motor. Fiberglass front end components were used to further lighten the already-light car. The cars were classed as A/Factory Experimental.

Late in the '64 season, Don Nicholson turned a 10.75 sec run at Cecil County Drag Strip in his '65 Mercury Comet with the 427ci engine. Mercury built 21 of these lightweight Comets.

First Street Hemi

When the 426 Hemi was first seen in 1964, it was strictly a racing engine. After Hemi-powered Mopars dominated the that year's Daytona 500 (finishing 1-2-3-4) they were quickly banned unless the motors were offered to the general public. This meant installing them in "ordinary" production vehicles. The first street Hemi appeared in 1966 B-body Dodges and Plymouths, including the new Dodge Charger.

Huge by any standards, the 426 Street Hemi was nicknamed "Elephant Engine" not only for its cubic capacity and power, but for its 800-plus pound weight. With a 4.25 inch bore and 3.75 stroke, the seven-litre OHV V-8 was based on an iron block with four-bolt-main, cross-bolted caps. The crankshaft was made of forged-steel, as were the connecting rods. Compression ratio for the street Hemi was 10.25:1.

For induction, the street hemi had an aluminum dual-plane dual-carb manifold with dual Carter AFB four-barrel carburetors mounted in-line. With a solid-lifter camshaft, 425 horsepower was advertised, but actual output was closer to 500. Torque was listed at 490 lb/ft at 4000 rpm.

first muscle car

Since NHRA outlawed aluminum body panels after 1963, the new Super-Stock Dodge bodies were steel but with numerous weight reduction features. The cars had no sound deadener, insulation or undercoating. A modified grill eliminated two of the headlights, and only one wiper arm was installed. The Hemi engine itself had aluminum heads, bringing the cars weight down to less than 3,200 pounds. With dual four-barrels carburetors, engine output was over 500 horsepower.

first muscle car

Although the GTO is most often cited as the first muscle car, history clearly shows that Pontiac wasn't the first car company to drop a big motor in a mid-sized car, but they were the first to market a mid-sized car with a big motor. Rivaling anything on the road in straight-line acceleration, the 1964 Tempest-based GTO was wildly successful, prompting other car companies to use the same formula. Every U.S. car manufacturer began packaging a factory hot rod with youth-oriented advertising, bringing about the muscle car phenomenon of the sixties.

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