Each week, we take a look at a pair of classic battlers. Bikes which have defined their class, and often sat at the top. But which is best? There’s only one way to find out… This week, we’re onto the two-wheeled equivalent of a hard rock power ballad – yes, it’s the Power Cruisers! Ducati’s superbike-engined Diavel versus the enormous Triumph Rocket III. Let the tyre smoking begin!