AMC Javelin AMX 401

AMC Javelin AMX 401

The 1971 AMC Javelin AMX 401 represented the absolute pinnacle of AMC's muscle car ambitions. The second-generation Javelin had been redesigned with more aggressive styling, and the 401 cubic-inch V8 was the most powerful engine AMC offered, making this combination the most potent production AMC ever built.

The 401 V8 (6,572cc) produced 330 gross horsepower at 5,000 rpm and a massive 430 lb-ft of torque at 3,400 rpm. This was AMC's response to the big-block engines from GM, Ford, and Chrysler. The engine featured a four-barrel carburetor, dual exhaust, and a cast-iron exhaust manifold. In the relatively light Javelin body, the 401 provided explosive straight-line performance.

The second-generation Javelin, designed by Dick Teague, featured a dramatically restyled body with a more aggressive front end, wider stance, and muscular fender lines. The AMX trim added specific badging, blacked-out grille, and functional hood scoop with Ram Air induction. The overall effect was one of the most aggressive-looking American pony cars of the era.

Inside, the Javelin AMX featured bucket seats, full instrumentation including a tachometer, and a floor-mounted shifter for the four-speed manual gearbox. The Twin-Grip limited-slip differential was essential for managing the 401's enormous torque.

The 1971 model year was a pivotal moment for American muscle cars. Federal emissions regulations and insurance industry pressure were beginning to erode horsepower across the industry. The 401 Javelin AMX represented one of the last stands of the unbridled muscle car era, and it did so with a car that could genuinely compete with anything from the Big Three.

Production numbers for 401-equipped Javelins were modest, making them relatively rare today. The 1971 Javelin AMX 401 is increasingly recognized as one of the great underappreciated American muscle cars — a car with legitimate performance, distinctive styling, and a fascinating underdog story.