Does anyone know why the horsepower figures always seem to loose just a couple either with time or when quoted for US as compared to what's quoted in say a british mag? Is it an emissions thing? For example the Boxster S when it was first introduced was quoted as having 252 horsepower but it became 250 (atleast for the US market). For the GT2 I saw 460 and 462 alot but the US was officially 456 I believe. Not that such a miniscule amount of power makes a difference but what's up with that?
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YOUR RESEARCHSlight hosrepower differences between ROW & US...
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Probably something to do with units of measure. It;s like gas. Our 93 RON is like their 98 RON.
Difference between SAE and DIN methodologies for determining power output.
Correct. That's usually the difference you see in publications. However, I have noticed a lot of misprints myself. DIN HP x 0.986 = SAE HP
And I should have clarified: SAE = Society of Automotive Engineers (US) http://www.sae.org/servlets/index DIN = Deustches Institut fuur Normung (German) http://www2.din.de/
I would've thought the germans would be more likely to under rate than americans. Intersting, thanks for the info.
The ensuing from the archives helps as well: https://rennlist.com/forums/showthre...SAE+Horsepower
Bill, Great article. Glad you found it. J
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