1. BMW 324d E30
Today, BMW sells most models with diesel engines, especially in Europe. The diesel technology proved an ideal match in most cases. The oil-burners can never have the same sound or feel as the thoroughbred six-cylinder engine. However, the start of BMW’s diesel offensive was very modest and in the form of 324d. It was one of the worst cars this company ever produced (via BMW Guide).
Introduced in 1985, the six-cylinder diesel was significantly underpowered (86 HP), slow and heavy. It was complicated and not very reliable. It turned the light and nimble E30 3-Series into a terrible driving car. Some buyers found it appealing but soon regreted the choice.