Things have indeed gotten bigger. During my college years in the 60's I sailed as an "oiler" on the Motor Vessel Townsend, a cement carrying lake freighter propelled by a slow speed diesel. I've forgotten many of the details but the engine was two stories high, ran at flank speed of 100+rpm with a slow speed of around 60 rpm---you could hear each cylinder on the power stroke---it developed 2000 shaft horsepower. I don't know its bore and stroke. As the oiler ( an able bodied seaman billet) I had to adjust the oil pressure by manually moving a reostat every time the engine speed was changed. When the captain ordered reverse, the engineer had to be stopped, then restarted in reverse. One of the most memorable things about this engine was the volume of its operational noise. I suspect my hearing was permanently affected for to communicate people had to literally shout at each other and do so directly into each other's ears---hand signals were the preferred communication mode and we had a bunch of those. The engine burned a very heavy grade of diesel but I don't think it was crude An even louder engine---went beyond the pain threshold when it ran---was the 12 cylinder engine that ran the unloading equipment--an engine that was used in railroad locomotives, I believe. Not a good muffling job there as it was smaller than the main engine but louder. It was most interesting to me to read the Monster Engine post and view the pictures--brought back some youthful, pleasant memories---and I had a baseline upon which to base a comparison. Thanks! Doug Pugh 36' trawler "Periploi" 6 cylinder Perkins engine.