Not really, if you understood older large engines. It was a single rod on one side of crank with inline double acting cylinders (inline - tandem) . Some tandem steam engines were compound, meaning a smaller primary high pressure cylinder and secondary larger diameter cylinder in line which used the lower pressure exhaust steam from the primary cylinder.

At the Henry Ford museum in Dearborn, MI, they have one of Ford's 9 "gasteam" engines which he had built to power all the machinery on 250 volts DC at the Highland Park Model T factory. Ford moved it there and more or less built the museum around it. I'd love to have seen the boiler room that fed those engines.

Ford and Thomas Edison were both big promoter of DC in the early years, but fortunately George Armstrong and Nicola Tesla's alternating current won out.

Those huge engines had steam cylinders on one side of the flywheel (which was a huge generator) one 36 inch diameter (primary high pressure) cylinder then, tandem on the same rod a secondary low pressure cylinder of 72 inches diameter both, of course the same stroke of 72 inches. On the other side they had two double acting 42 inch cylinders in tandem running on coal gas. Once again, 72 inch stroke. The main inline rods were about a foot in diameter past the cross head. They ran on huge sliding shoes between cylinders and at the far end of the cylinders to support the huge weight of the pistons.
Good videos of it are at:
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They claimed the coal gas cylinders were harder to govern so they used the steam side for control. Each engine/generator station was rated 250 volts at, if I remember correctly, 4 megawatts a total power rating of about 6000 horsepower each. My mind might be incorrect on some of the numbers. The Henry Ford is worth a visit just for the steam engines on display. Plan on spending a week there if you're interested in machinery, etc.

I don't understand everything I know about things, grin.