It even earns a spot in the model’s complete name: XDiavel V4. Image: Dan Carney / Popular ScienceFor the XDiavel V4, Ducati switched to a V4 engine used previously by its Multistrada dual-sport model. Details like this slickly integrated turn signal are the reasons why the XDiavel V4 earned the “Red Dot Best of the Best Award” for product design. The XDiavel V4 also features cylinder deactivation, which shuts off the rear bank of cylinders at idle and part throttle. They will be thrilled if they give the XDiavel V4 a try, and their backs will probably thank them too.