Though plush and ornate, the S90 falls short of the refinement expected of a midsized luxury sedan, due to the stiff ride and gruff-sounding engine. Only four-cylinder engines are available. The 316-hp supercharged and turbocharged T6 pulls strongly, but acceleration falls below class expectations. We measured a respectable 23 mpg overall in our tests. The base T5 version uses a 250-hp turbocharged four-cylinder. All-wheel drive is available. Handling is sound but ordinary. The roomy cabin is gorgeous, with supportive seats, but the iPad-like touch screen proves frustrating to use. Automatic emergency braking, including pedestrian and large animal detection, is standard. The Pilot Assist system combines steering assistance and adaptive cruise control to try to make driving easier. The V90 is the wagon version. As of 2018, the S90 comes only as a long wheelbase version with a roomy back seat.