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Naming an engine beyond its actual displacement can do wonders for an automaker’s marketing efforts. The capital-H Hemi has inestimable brand value, and Ford for many years relied on the Thunderbird script on V-8 rocker covers to impart the image of performance. Naming an engine can also lead to plenty of confusion years down the road, as we see with GM’s Iron Duke four-cylinder.
The Iron Duke itself is a fairly straightforward engine. Its pushrod overhead-valve design was typical of its time, as was its iron-head and iron-block construction. It had no balance shafts, multiple valves, cam phasing or any other advanced technology. On its introduction, it had a carburetor, a non-crossflow head, and absolutely nothing that would have made a buff book-reading car nerd of the time geek out. Pontiac engineers needed a durable powerplant, and they seemed to agree that durability derived from simplicity.
Yet there is a key misunderstanding about the Iron Duke, that we need to address...again.
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