The nickname refers to the Windsor Engine Plant in Ontario which, though in Canada, is just 20 miles from Ford's world headquarters in Dearborn, just west of Detroit.
Many examples were built there, but others were manufactured in Cleveland, Ohio. This can lead to confusion, since another, unrelated Ford small-block V8 is often referred to as the Cleveland. Be that as it may, the Windsor was fitted to an extraordinary range of vehicles over very nearly four decades, and although none of them are in production any more you can still buy a brand new engine if you have the right car for it.
Please note: accurately quoted horsepower figures have been supplied by Ford's very helpful archive department, and are expressed in the units commonly used when the cars were on sale. Let's dive in: