The scream of a sky-high redline. The unmistakable sound of a Subaru boxer engine. The wave of torque from a twin-turbo engine. The whine of a supercharger… These are some of the much loved traits of some truly legendary engines of the past few decades. While these engines are highly rewarding in their own unique ways, they also have a reputation for being temperamental at times, and, if you’re unlucky, downright unreliable. From rod bearings, head gaskets, oil leaks and more, all the engines on this list have major shortcomings that will be a deal-breaker for some and charming or charismatic for others.
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