quote: The cylinder size has increased slightly and if bore were increased as well it help retain the max torque figure; likely at the cost of usable rev range
quote: Changes to the fuel injection system could explain a high max. power, whilst also allowing considerably improved cruising mpg (further helped by the reduction in capacity)
quote: The main point being that the traditional methods of implementing internal combustion engines in vehicles is highly inefficient. Historically this is limited by a need to make engines mechanically self-regulating.