Plymouth GTX

1971 Plymouth GTX

“Our luxury high-performance GTX comes standard with a 440 4-barrel V8. TorqueFlite automatic transmission. Buckets. And more. It’s a great teaming of styling, performance and luxury.” 1971 Plymouth sales brochure.

  • The GTX was completely restyled inside and out for 1971.
  • Horsepower was dropped slightly for the two 440 CID V8s because of new federal emissions standards.
  • 1971 would prove to be the final year of the GTX

Muscle Car Specifications

Performance Model
1971 Plymouth GTX 440
Engine Used
Zero to Sixty
6.5 sec
Quarter Mile
14.9 sec @ 95.4 mph

Plymouth had been producing very powerful cars for decades, but these were usually built through options packages. So when the company decided to build a muscle car, they decided to pull out all the stops. Introduced in 1967 and based on the Belvedere line, the car provided the highest standard performance and the most luxury of any other car in the line. And for a while, it looked successful.

Sales rose for the first couple years of the car’s life, and seemed that car-buyers recognized what a great car the company had built. But when sales started to drop, they dropped fast. A variety of factors accounted for this, but it was at least partly because of the popularity of Plymouth’s own Road Runner. The car also was based on the Belvedere and featured somewhat ample power (but not as much as the GTX), but featured a much lower price because of its more basic interior.

To make matters worse, other muscle cars were selling well at the time. Even over at Dodge the Charger, which used the same platform as the GTX, saw sales going up as soon as the GTX’s started going down. And though sales figures would not recover, Plymouth did present one final great car before discontinuing it before the 1972 model year began.

The outside of the car was designed to be more intimidating while still bringing more curves to the styling. Though it didn’t look like it, the car was actually smaller than the 1970 version. The hood was new and featured cutouts, and an Air Grabber, which had a flap operated inside the car, could be added as an option.

Under the hood, things were basically the same as they had been in 1970 other than the aforementioned power drop. The standard engine was a 4-barrel 440 CID Super Commando V8 that was rated at 370 horsepower. This could be upgraded to a 2×3-barrel version of the 440, which was produced 385 horsepower. Both these numbers represented a drop of 5 horsepower from the year before. And the top engine was the 426 CID Hemi V8, which was rated at 425 horsepower.


The convertible version of the GTX had been discontinued in 1970, and it wasn’t back for this year. The Hardtop, the lone GTX model remaining, saw production drop 62 percent from the year before to 2,942.

The base price for the GTX was $3,733. Upgrading to the 3×2-barrel engine added $125 to this price, and the choosing the Hemi added $953. Only 20 cars included the Hemi in 1971.

Muscle Car Competition

Though the GTX was underappreciated for nearly the entirety of its life and was discontinued without fanfare in 1971, it is likely that it wouldn’t have been nearly as good a car if it had stuck around. Plymouth seemed to pride itself in making sure the GTX was its top performing muscle car, and the emission regulations that hit the car industry in 1972 would have neutered it. For this reason, 1971 also was the final year for the 426 Hemi.

Because of these regulations and other factors like rising insurance and gas prices, the majority of the muscle car class would be killed off within the next few years, anyway. It’s just a shame the GTX wasn’t better known while it was still around.

Engine Specifications

Type Size Carb Horse Power Tourqe
426 Hemi 426ci 2x4bbl 425 hp @ 5000 rpm 490 lb-ft @ 4000 rpm
440 Six Barrel 440ci 3x2bbl 385 hp @ 4700 rpm 490 lb-ft @ 3200 rpm
440 440ci 1x4bbl 370 hp @ 4600 rpm 480 lb-ft @ 3200 rpm

Performance Statistics

0 to 60 mph Quarter Mile Engine Source
6.5 sec 14.9 sec @ 95.4 mph 440ci/370hp Car & Driver 11/70
Overall rating
Parts Availability

Awesome 71 G.T.X

l OWN A SURVIVOR 71 GTX THAT IS PLUM/WHITE, WITH A WHITE interior.The car is the strongest car, from a standing start, that I have ever driven.This includes my 70 Superbird.

Overall rating
Parts Availability


I’m sorry; I just don’t like this car. It looks like it will plow into the ground and bury itself at any moment. The front end is slanted toward the ground and that huge rear end looks like it is pushing the car toward the deep recesses of the earth. This is definitely a love it or hate it kind of car.

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