Thank you - I'll try to see through the sources you guys recommended.
I just hoped that this kind of thing would be easier and more accessible to find - I wish of mine is that some day, all magazines would make their collection (free) available like MotorSport does. I understand that paying to see certain things is a way of contributing to maintaining these publications - but having articles from 50-60 years ago locked behind paywalls makes no sense at all.
I'm sure we all would like that, but the variation in copyright laws and periods around the world and the cost of providing and maintaining online archives are probably the biggest factor. There was much controversy over the policies of the Google News and Google Books archives, with publishers unhappy that Google were scanning and making old publications available without asking - the Google News archive has essentially disappeared, as have many of the old magazines which used to be on Google Books. The archive of the aviation magazine Flight disappeared in 2019 when the main website was revamped and still hasn't returned.
The Motor Sport archives were originally scanned and sold as CD-ROMs. It was only after Haymarket sold the magazine to the current owners that the online archive was made available. Haymarket had done all the hard work, so it was probably quite simple to get it online.
To be fair, there are some excellent free online archives like the Austrian ANNO and Gallica in France, but they do adhere to the 70 year copyright rule ...