I was an Engineer Officer with the Blue Funnel Line (Alfred Holt & Co) Liverpool.
I sailed on ships which had these Sulzer engines, also Twin Burmeister & Wayne engines, 6 cyls each and Supercharged. Each cyl had 3 pistons, and fired top and bottom of the stroke.
They were 4 storey's high and fairly quiet when you consider the size. If you think it is hot in Nevada, you should try crossing the Equator in the Engineroom of one of these ships. Apart from the Main engine, we had 6 nine Cyl Generators, a Refrigeration Plant, 2 Steam Boilers, 4 giant Compressors, and various other pieces of machinery all running down there.
The engine is started up with compressed air, on Diesel oil at first, then changed over to Boiler Oil, which is so thick it has to be superheated with steam to get it to flow through the pipes. The ships I sailed in burned 24 tons of fuel per 24 hours sailing.