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1991 300 SE
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18,534 Posts
One is slow and the other slower.

NA 617s aren’t bad, however, if you know how to work them. Mileage is about the same.
 

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'77 6.9, 74 240D, 96 Ram 5.9L Cummins
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2,654 Posts
Matt,

NA 300D - 88hp ~25mpg
Turbo 300D - 125hp ~28mpg

Get a turbo 300D if you're driving anywhere in the Bay Area...people drive fast.
 

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'77 6.9, 74 240D, 96 Ram 5.9L Cummins
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2,654 Posts
I would say to get a turbo just because they don't have the ACC climate control units which are a pain to work on.
 
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