2019 Volvo XC90 D5 R-Design long-term review: Highway driving

How good is the diesel-powered Volvo XC90 on the highway? To find out, I have subjected it to my own commute of 70-odd kilometres at mostly highway speeds. Multiple times. Our example is an XC90 D5 R-Design, with a few accessories thrown in: Nubuck leather seats, Premium Pack (panoramic sunroof, premium sound system and tinted rear windows) and optional adaptive suspension.