Emerging trends in Automobile Engineering

I want to share the following thread CEans:
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Yes its all about the emerging trends of automobile industry.They had described that their main aim is to bring out maximum efficiency from the engine.For attaining that much efficiency , They had explained four emerging trends that will improve the efficiency.They are downsizing,downspeeding,boosting,direct fuel injection.I know a little detail that boosting involves the usage of turbocharger and supercharger.And direct injection also had been a talk in the recent talks and I dont know about downsizing and down speeding.Is downsizing involves the reduction of size of engine¿
what does the downspeeding means¿Also pour in your suggestions on it so that it can help me to enhance my knowledge and it also enhances your knowledge.Lets flood in CEans.I am waitingggggggg?