Project-based learning (PBL) involves real-life-based use of investigative, interactive and creative tasks that extend beyond the classroom and culminate in authentic products. PBL can be used as a means to promote tertiary-level EFL learning, yet there is little research on the issue in Turkish higher education contexts. This study develops a PBL model with research, translation, creativity and interaction components for tertiary-level EFL preparatory class students and investigates its perceived effectiveness. The data were collected by questionnaires and interviews and analyzed through statistical and thematic analyses. The findings showed that there were significant differences in the students' perceived competence in oral presentation skills, speaking fluency, speaking confidence, creativity in writing, creativity in visual or audiovisual output production, and time management before and after the treatment. Besides, thanks to PBL, the students were stated to experience research writing and translation. However, the PBL process was also found to be challenging due to the heavy workload. It is suggested the model be used in all kinds of EFL contexts including tertiary-level classes.