Improvement in CS/Electronics/MCU technology is a big contributing factor. In India, We have a motor cycle called Bajaj Discover which gives amazing mileage. T

Improvement in CS/Electronics/MCU technology is a big contributing factor. In India, We have a motor cycle called Bajaj Discover which gives amazing mileage. The innovation in mechanical engineering is very small, bulk of the innovation is timing of the spark plug firing controlled by a micro controller combined a engine design which functions per that intelligent design. These sort of things were impossible even 20 years back, given the size, price and many other factors.