How do you to tell the difference between a 1993 ford ranger 4.0L and 3.0L?

Answer 1

Look at the VIN # on the vehicle. If the 8th digit is an X then you have a 4.0. It is it a U then you have a 3.0. It may also list the engine size on the intake manifold and on a placard under the hood or on the radiator support.

Answer 2

If the eighth digit in the vehicle identification number (VIN) is "U", it's a 3.0L. If the eighth digit is "X", it's a 4.0L.

Answer 3

4.0 is a more powerful engine, with a higher displacement.