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 only on the T6 for now. 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, as is Drive Assist, which gives the car limited self-steering capability. The V90 is the wagon version.