Bentley: Shone on Lane debut
Spurs started with all their major signings of the summer - Bentley, Luka Modric, Giovani dos Santos and Heurelho Gomes - in a strong line-up which also included Dimitar Berbatov.
It took less than three minutes for Bentley to hand the Londoners the lead when his crossed free-kick from the left evaded everyone and curled straight into the net.
That advantage was doubled in the fifth minute when a sloppy pass from French defender Philippe Mexes was intercepted by Bent and he slid home for his 11th goal of a promising pre-season.
Bentley capped a rousing first-half display with a third in injury-time when he collected another poor Roma pass and blasted into the bottom corner from 25 yards.
The match followed a similar pattern after the break and Aaron Lennon made it 4-0 in the 50th minute with a drive from the edge of the box following good work from Giovani.
Bent fired in a fifth four minutes later after Jonathan Woodgate flicked on a Bentley corner.
The Serie A side saw midfielder Alberto Aquilani sent off late on after picking up two yellow cards in quick succession.