Owned by Sheikh Mohammed Obaid, the son of Shamardal was making a quick return to the track having finished a promising second over seven furlongs at Leicester last Tuesday.
Andrea made the most of that experience here, settling Cape Byron behind early pacesetter and warm market leader Rummani as the action developed towards the far-side rail.
The tempo lifted entering the Dip and Cape Byron could be spotted travelling ominously well, Andrea pulling the horse out to challenge and taking up the running with the minimum of fuss.
He cleared away under hands and heels riding meeting the rising ground, the margin at the line proving two and a half lengths to newcomer Manchego in second, with a further length and a quarter back to Rummani in third.
Roger said: “Cape Byron is a horse we like and he has stepped forward nicely from his debut run this afternoon. This looked a good race on paper beforehand and the form should prove solid.
“Much will depend on how he winters, but we will almost certainly have to campaign him like a nice horse next season, with a Guineas trial a possibility. He is very exciting.”