M-18 specifications (CAA - 1948)
For the original Mooney M-18 with the Crosley Engine.

M-18X specifications (FAA - 1972)
This is a summary of the DOT/FAA Aircraft Specification No. A-803.

Model and Engine data
This data is taken from the FAA aircraft database.

More specifications:

Crosley Engine

Continental Engines

Lycoming Engine

Mooney's own M-18L and M-18C Specifications