 The 1936 to 1939 models were 267 in³ (4.4 L) with hydraulic lifters added in 1938.The 1940 and 1941 cars used an enlarged 292-in³ (4.8-L) engine, while 1942 and early 1946 models used a 306-in³ (5.0-L), but lower compression ratio because of the iron heads.Late 1946 to 1948 Lincolns based on the Zephyr used a 292-in³ engine.