According to Engine Builder magazine, It was one of GM's first engines to use all-metric fasteners. By all accounts, the Iron Duke had a simple design, but the specs were pretty impressive.
Not every Chevrolet engine was a winner, especially not in the mid-1970s when the race was on to produce economical four-pots ...
the authority figure of choice was a duke, but in order to get across just how reliable its new engine would be, GM added a little metal to the mix. Thus, we have the Iron Duke, a name with a ...
In the other corner is the somewhat more modern 1986 Pontiac Fiero SE with a mid-mounted, 2.5-liter "Iron Duke" four-cylinder, an engine nearly ubiquitous in GM cars of the '80s. Judging by when ...
The Fiero was a very ambitious project that didn't pay off so well for General Motors. Here's a discarded ... 4 cylinders" and was the badging put on the Iron Duke-equipped Fiero coupes.