23. BMW M550d F10
BMW also dedicated much time and attention to diesel engines like other German car brands. BMW’s straight-six diesel engines were known for their power, torque, and low fuel consumption for decades. In 2012, BMW decided to make one of the most potent diesel sedans and show the world that oil-burners can be as fast as gasoline cars (via Carmagazine).
The model in question was the mighty M550d F10 which had a 3.0-liter diesel engine with twin-turbo technology, high compression internals, jets, and engine components. The result was 375 hp and a mighty 546 lb.-ft of torque. Even though the performance was impressive and 0 to 60 mph took less than five seconds, the reliability was terrible. Due to the enormous boost, engines were literarily eating themselves and the N5730S engine was discontinued.