The Volvo S90 is a luxury sedan that offers a refined interior, a spacious back seat, and a number of safety features: Interior The S90 has a high-end interior with soft leather, wood, and metal accents. Some say the seats are among the most comfortable in any car. Safety The S90 comes with many standard safety features, including a blind spot information system and a 360° camera. Space The S90 has a spacious back seat, even though it's priced more like a mid-size car. It's also 4–6 inches longer than most competitors.