Smaller, and sitting in a wheelchair means no luggage, no passengers in the rear, etc as you drive through this bit. And some are limited to special lower powerchairs, that are awful to use.
But take a look at some of these I photographed at a mobility show in summer:
http://www.wheelchairdriver.com/images- ... -roadshow/Theres plenty of others. Have a look at some of the advertisers site like brook mobility for eg. My van is left habd drive, from bekker mobility, imported on my behalf at half price from the US so also check out if they will import a left hand drive version and convert than, and ship it.