2007 Formula 400SS powered with Twin Volvo Diesels. Equipped with Hard Top & Generator. A You will not find a cleaner 400ss in the USA! Twin VOLVO PENTA 370 Diesel Engines. Only 100 original hours. The Formula 400SS design and premium quality makes a perfect vessel for those who enjoy the performance and speed of boating and the luxuries of a cabin cruiser. The Volvo Penta 370 engines top out at 48MPH with a cruising speed of 36MPH. Average fuel consumption at the cruising speed is only 24 gph. These engines are comparable to the Twin Mercury 496 Mag HO engines in performance but have outlasting performance with less maintenance over the lifetime of gas engines. The Sapphire Blue Imron Graphics FAS3TECH Hull will stop people in their tracks not only for the beautiful color but the sleek sexy look as it skims the top of the water.