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The Type 4 family of cars was available from the 1969 model year through the 1974 model year. Distinguishing one year 411 from another is difficult even to those of us familiar with the car. This year-by-year breakdown will help you to understand the evolution of the Type 4 family.

If you notice that I am missing some information, please feel free to email me.

1969 The 411 is introduced. It was only available in a 2-door sedan or a 4-door sedan. This year can be distinguished from the rest by the large one-piece headlights. This model year was only available in Europe. It was powered by a newly designed horizantally opposed, air cooled, four cylinder engine, displacing 1679cc (1700cc or 1.7 liters). The manual transmissions used a 200mm diameter pressure plate and disc.
1970 The Type 4 series was introduced to the U.S. market. The Variant (station wagen or squareback) was also introduced. This year also marked the introduction of the Bosch fuel injection. The flywheel diameter was enlarged to 210mm.
1971 No apparent changes
1972 No apparent changes
1973 The series received a facelift and was renamed the 412. The new look included a flatter hood, restyled front fenders, headlights lower in the front panel, the rear bumper was mounted higher, the rear taillights were slimmed down. The disk brake rotor diameter was increased, and the front coil springs were changed.
1974 The 1793cc (1800cc or 1.8 L) was introduced. The U.S. market wagons and four-doors received the 1800cc with an automatic transmission and fuel injection as standard equipment. The U.S. market two-doors got the 1700cc with a manual transmission and fuel injection as standard equipment. The front suspension was changed to a "negative offset geometry". (Don't ask me what that means. TS)

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