The Iron Duke engine (also called 151, 2500, Pontiac 2.5, and Tech IV) is a 151 cu in (2.5 L) straight-4 piston engine built by the Pontiac Motor Division of General Motors from 1977 until 1993.
HMS Iron Duke was a dreadnought battleship of the Royal Navy, the lead ship of her class, named in honour of Arthur Wellesley, 1st Duke of Wellington. She was built by Portsmouth Dockyard, and her keel laid in January 1912.
General Motors' four-cylinder Iron Duke drew on the proven engineering and lasted more than a decade. But it was shadowed by disastrous use in one model.
The Iron Duke: GM's Unkillable Engine That Never Got The ... - Jalopnik
HMS Iron Duke, like all Type 23 frigates, is one of the Royal Navy’s most versatile warships, embarking on a wide variety of operations, all over the world. Find out more about her history, role and crew here.
Early versions of the Iron Duke were carbureted, but the engine was improved over the years, eventually being renamed the Tech IV and gaining throttle-body fuel injection, among other upgrades, a major advancement at the time.
Pontiac has hot rodded the Iron Duke/Tech IV to a point where it now ranks as one of the most potent and successful 4-cylinder performance engines produced in America.
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 ...