 Known classically as the "counterflow 8 valve", the EA827 engine series is the root of most of Volkswagen's engines in the 1970s, 1980s and 1990s.It started as an Audi-designed engine and spawned straight-five-cylinder, diesel, crossflow, turbo, supercharged, and 16 valve variants.While mostly retired, the "second cousin" of the EA827 is still alive, known as the TDI.