Not only was the body a bit bigger, but the Kadett B also had a slightly enlarged 1100 cc engine. This was externally a very compact motor indeed, and looked rather lost in the Kadett’s Kavernous engine bay. Power output increased correspondingly; there were 45 and 55 DIN hp (high compression) versions for Europe; the weaker on was sent stateside with a 54 (gross) hp rating.
It had some crazy mechanical issues. At one point it stumbled and stalled because the carburetor had come loose from the intake manifold and I had to tighten it back down! Another time, my brother was driving it and the brakes failed. Somehow the end of the brake shoe that meets the brake cylinder piston had become worn on one side, causing the piston to slip off the end of the shoe when the brakes were applied, losing braking and squirting fluid all over.