The Diavel's heart is the Ducati Testastretta 11° Dual Spark (DS) - developed directly from the incredibly powerful, world-beating race engines of Ducati Corse. Ducati's Testastretta 11° DS harnesses the immense power of the Superbike engine and makes it smoother and more linear, combining high performance with an enjoyable and perfectly manageable ride.
To create an engine with this blend of brute power and supreme usability, Ducati carefully developed its cam timing with a particular focus on the valve overlap angle. Defined as the period of crankshaft rotation (in degrees) during which both intake and exhaust valves are open at the same time, this overlap angle is set at 11° on the Diavel's engine - much less than the 41° used by Ducati's Superbike engines. As a result the fresh inlet charge is less compromised by exiting exhaust gases, resulting in smoother combustion, improved fuel economy, and lower exhaust emissions.
Along these same lines, the Testastretta 11° DS employs several other technological advances. Targeted injectors direct their charge to the intake valves, which provides better vaporization of the air/fuel mixture. This compressed intake charge is ignited by twin spark plugs in each chamber for rapid and even combustion. And after exiting the combustion chamber, a secondary air system burns off any residual fuel molecules, allowing a richer mixture to be used without increasing emissions. As a combined result of these technologies the Testastretta 11° DS is the perfect base for the Diavel - full of character, and producing tremendous power that give unmatched acceleration, along with smooth and controllable delivery for cruising the boulevard at any speed.