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Heart-thumping power: 3.8-liter V6 engine, 9-speed transmission For 2021, Frontier continues to feature the all-new V6 engine and all-new 9-speed transmission introduced on the model year 2020 Frontier. Along with best-in-class 310 horsepower1, torque is rated at 281 lb-ft. Development of the engine, which previews the powertrain to be offered in the next-generation 2022 Frontier, focused on the needs and demands of U.S. truck owners. Key technical features include the direct injection gasoline system, cylinder heads...Read.