Ducati reveals new Desmo` engine with variable valve timing

Ducati have revealed a new version of their Testastretta engine that will feature Desmodromic variable valve timing and will be called the Ducati Testastretta DVT. This system will feature variable timing on both inlet and exhaust valves, allowing for optimised combustion throughout the rev range and bringing about new levels of efficiency and power.

Why vary valve timing?