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The Wikipedia:WikiProject Automobiles/Conventions states: We use the standard International System of Units (SI) describing automobiles, and will generally follow the SI writing style. Do not conflate metric with SI, the SI is updated continually and older metric units are dropped from the SI. (mmHg is metric but the SI unit for pressure is the Pascal). Quote: The Power and torque figures should usually be written in metric form with the imperial conversion in parentheses. Metric measurements of power should be expressed in kilowatts (kW). Metric horsepower (pferdestärke, PS) may be included for older vehicles. Metric measurements of torque should be expressed in Newton metres (N·m). You are placing a metric unit first instead of an SI unit when reverting my edits. No one is suggesting we change the name of the vehicle. Avi8tor (talk) 12:51, 17 January 2024 (UTC)Reply
When this car was built, no one used kW. Since horsepower are still widely used across the entire world, there is no need to lead with an anachronistic unit. I again ask you to check out the Italian, French, and Swedish language pages - they do not even use kW at all. See the table at WikiProject Automobiles; it includes leading with horsepower specifically for older cars. If horsepower was an obscure and no longer understood unit I would absolutely agree with you (which is why kgm is not included as an option for metric data, even when it is the original unit).
Also, this does follow the MOS:UNIT guidelines: the primary units chosen will be SI units (such as kilograms), non-SI units officially accepted for use with the SI, or such other units as are conventional in reliable-source discussions of the article topic. When discussing the Fiat 509, all sources (period or current) use metric hp when discussing this car. Mr.choppers | ✎ 16:49, 17 January 2024 (UTC)Reply
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