Garjanai offers a gripping storyline typical of early 80s Tamil cinema, blending action and drama with emotional undertones. The screenplay maintains a steady pace, with the first half effectively setting up the characters and conflicts, while the second half escalates the tension leading to a satisfying climax. The narrative occasionally leans on familiar tropes but is elevated by strong performances and engaging dialogues.

The songs composed by Ilaiyaraaja stand out as a highlight, seamlessly integrating with the film's mood and enhancing key moments. The background score complements the action sequences and emotional beats, adding depth to the viewing experience. However, the cinematography lacks innovation, adhering to conventional framing and lighting of the period.

Overall, Garjanai balances entertainment with social commentary, supported by a solid musical score and competent direction, making it a memorable film in Rajinikanth's early career.

Rajinikanth: Charismatic and intense, delivering a powerful portrayal of the righteous hero.

Madhavi: Provides emotional depth and complements the lead with a nuanced performance.

Thengai Srinivasan: Offers comic relief with timing that lightens the narrative effectively.

Major Sundarrajan: Strong presence as a supporting character, adding gravitas to the story.

M. N. Nambiar: Villainous role executed with convincing menace.

Geetha: Delivers a solid supporting role with subtlety.