OREANDA-NEWS. March 25, 2016. After seeing the S90 on auto show floors and flogging them through severe winter conditions, Volvo's new flagship sedan now has a price attached to it. Base T5 versions powered by a turbocharged 2.0-liter four-cylinder engine will begin at \\$46,950, which includes a standard leather interior, 9.0-inch Sensus touchscreen infotainment system and Volvo's signature "Thor's Hammer" LED headlights.