[DonRotolo]

Recycled doesn't mean worn out.

The OP asked how to figure out what would be most powerful, also considering weight.

You can't do this scientifically, at least not easily, since specs are hard to come by. So, we take an empirical approach.

Window motors will be the weakest. Seat motors will be almost as weak. Door motors are only used in certain vehicles, but they are more powerful. Wiper motors are in every car, and are generally most powerful, but not always. Bigger cars have bigger wipers, which need bigger motors. Luxury cars don't have to design as close to the financial limit as economy cars, and they make their reputation with longevity.

The most massive wiper motor I have ever seen is from the Mercedes models that use a single arm to wipe the whole windshield. These are E-Class cars from 1986-95, and the newer E-Class from 96-2002, along with the S-Class 92-99 and SL 1990-2002-ish. There are others, but those I'm familiar with, and those models are plentiful.