Dodge (1) - 8 (EFI) 1949 model
Plymouth (1) -6 (V, EFI) 1948 model
Chrysler (1) - 4 (turbo, EFI) 2004 model
mower (1) - 2 (V, EFI) 2021 model

Looks like 20 to me, if my math still works.