Detailed specs and features for the Used Porsche Boxster GTS including dimensions, horsepower, engine, capacity, fuel economy, transmission. Edmunds Summary Review of the Porsche Boxster GTS Convertible · Stellar handling · engaging yet fuel-efficient powertrains · artfully designed cabin · endless. GTS 2dr Rear-Wheel Drive Convertible Porsche Boxster Specs lbs. Drive type, rear-wheel. Turning radius, ''. Show More.