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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparison of 8-cylinder engines on characteristics such as smoothness, silence, weight, and installation convenience.

Identifier  ExFiles\Box 173\1\  img353
Date  19th February 1934 guessed
  
II

could clearly be detected.
The Pontiac had the Buick characteristics. Of course these 8's are the most massive cast iron structures (The 300 cu in Buick engine, I believe weighs about 900 lbs). I am trying to get a run on a Packard 8 which has an aluminum crank case. Really the Terraplane that Sq. tried or any 8 Buick that you can borrow from Oscroft are good aberage examples of what is being done in smoothness with this type of unit.

SILENCE
It seems to be generally agreed that the line 8 is the easiest unit on which to silence both the exhaust and intake

WEIGHT
The straight eight, being less compact, is obviously heavier than the V8 but I have not been able to get a direct comparison from anyone. They are using considerably less balance wt on the line than on the Vee engine.

CONVENIENCE OF INSTALLATION
The line 8 is fundamentally a non compact unit but in practice, owing to its small width, it can be flannelled into the dashboard and so take up little more
  
  


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