I seem to recall a 0 - 60 time of around 18 seconds reported for the 240D. Don't recall if that one was a stick or automatic. Alot also depends on engine temperature, and the condition and shift characteristics of the particular automatic tranny. IMHO, my '82 240D, with automatic, shifts and performs better after warm-up, and accelerates better than most automatic 240Ds I've tested. (The seller of my 240D DID claim to have had the tranny rebuilt)
I've driven one automatic 240D that accelerated significantly better than mine, and a couple that were much worse.

Happy Motoring, Mark

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DrDKW