Am I missing something here? I was always under the impression that a 912 and 914 engine were BOTH “Type 4” engines. The 912 had a stand-up fan shroud (like we’re accustomed to) while the 412 boxy station wagon car (with the same engine) had a “pancake” shroud to get everything under the floor of the car, like a Type 3 but a 2-litre engine.