Road / racing bikes typically run taller gearing while road / touring bicycles will run gearings that are very similar to mountain bikes and hybrids.
Higher end racing bicycles will have gearings that are much higher than the average rider will find comfortable as they are designed for higher speeds and fitter riders that have less need of ultra low gearings... these are also lighter bicycles that are rarely encumbered with extras like racks, fenders, and extra gear.
Solution would be to swap the road double with a triple or a modern compact crank and take a look at the rear block to see if it caould be altered as in many cases you will have a narrow range out back that is not suited for hill climbing.