This article is from the Watercooled VWs General FAQ, by Jan Vandenbrande with numerous contributions by others.
Type I: 1938-
Beetle, Cabriolet, Karmann Ghia, 181/Thing
A small car with an upright air-cooled engine.
Type II: 1950-
Transporter, Bus, Camper
A utility vehicle (truck) with either an upright (early) air-cooled,
pancake (middle) air-cooled engine, or a pancake (late) water-cooled
engine. See also T1 through T4.
Type III: 1962-1973
Sedan/Notchback, Coupe/Fastback, Variant/Squareback, Karmann Ghia
A mid-sized car with a pancake engine.
Type IV: 1968-1974
Sedan (2/4-door), Variant
A large car with a pancake engine.
OTHERS: [Anyone know whether these fit at all into the VW nomenclature?]
VW-Porsche 914: 1970-1976
Coupe
A mid-engine coupe designed by Porsche and built by Volkswagen.
K70: 1971-1975
Sedan
A large car (but smaller than a Passat) with a watercooled inline 4.
Iltis: 1982-
Convertible
A four-wheel drive utility vehicle designed largely for military use, using
both Beetle and Golf components.
Fox/Voyage:
A small car with a longitudinal FWD layout. Made in Brazil and exported to
North America.
 
Continue to: