were there different engines available for 91 honda civic 4 door sedan

dx and lx with the 1.5L engine and the ex with the 1.6.same motor as in the crx si

depending on where in the world you are the following engines were available in the 1991 civic:

1.3 L engine code - D13B I4 (Europe/Japan)
1.4 L engine code - D14A I4 (not US or Japan)
1.5 L engine code - D15B I4 (everywhere)
1.6 L engine code - D16A6 I4 (everywhere)
1.6 L engine code - B16A I4 (Europe/japan)

1.3 L D13B I4
1.4 L D14A I4
1.5 L D15B I4
1.6 L D16A6 I4
1.6 L B16A I4