The Kia Telluride is a spacious SUV. However, it has several roominess-related disadvantages when compared to a Subaru Ascent. For instance, the front-seat space in a Kia Telluride involves 40.9 inches of headroom and 41.4 inches of legroom, while the Subaru Ascent provides 41.3 and 42.2 inches, respectively.