It’s great to see people still working to improve the good ol’ internal combustion engine. The standard ICE is just so inefficient that someone should be doing it! And the ladies and gentlemen over at LiquidPiston are doing it.
Check out this great new design that merges recent advancements like direct injection with a more classic rotary engine (except with modifications) to build a hyper-efficient internal combustion engine: http://www.popularmechanics.com/cars/news/auto-blog/liquidpistons-hyper-efficient-engine-turning-the-rotary-inside-out-13817971
You know where this engine belongs? Connected to a generator in a car with electric motors that drive the wheels and a gas (or diesel) that generates electricity for longer trips. It’s compact, light & powerful; fits the bill perfectly!