The 138 comes apart easily. All you need is a large phillips head screwdriver to remove the condenser head. All the collar locks along the column are tightened and loosened by hand. Once apart you'll have no problem fitting it into a compact car.
It is a good thing that this enlarger has a set of condensers and some spare bulbs. You cannot get a more even lightsource for b/w than a durst condenser head.