The 2020 Volvo S90 is available as a 4-door, 5-seat sedan. Starting at $50,550, the 2020 Volvo S90 Momentum is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 31-mpg on the highway. The top of the line 2020 Volvo S90 Inscription, priced at $53,650, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 31-mpg on the highway.