You may have heard the terms thrown around — "Type 1 engine," "Type 4 engine," "did it come with the 1600 or the Type 4?", which can get confusing. Both engine types are air-cooled, and both are flat-fours (horizontally opposed pistons)...but under the skin they're quite different, and knowing which one you're dealing with is valuable information. Here's a breakdown of what separates them. Background Confusion arises because Volkswagen typically uses the term "Type" to design
