Mar 4, 2008 9:32:33 PM
- fritz
- Rennteam VIP
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- Loc: BaWü , Germany
- Posts: 10248, Gallery
- Registered on: Jul 23, 2003
- Reply to: Boxster Coupe GTS
Re: GT-R power output vs 997TT...
Quote:
Boxster Coupe GTS said:
According to Nissan, the GT-R engine produces maximum power output of 480PS or 473bhp at 6400rpm, implying 271bhp/tonne...
...but this maximum is described as "net power output", as follows:
*The engine power output values indicated in this catalog are all net power output values.
* Engine power output can be indicated as 'Net power output' or 'Gross power output'.
'Gross' values are estimations of power output of the engine alone. 'Net' values are estimations of when the engine is assembled onto the vehicle. For estimations of the same gasoline engines, 'Net' values are approximately 15% lower than 'Gross' values according to JAMA research.
...so that would imply that the GT-R engine produces maximum "gross power output" of 564PS or 556bhp!!!
...and given an official curb weight of 1740kg, that would represent a power/weight ratio of 319bhp/tonne!!!
...which could also explain why the GT-R is apparently quicker than a 997TT with 298bhp/tonne!
It does not really explain it, since all car manufacturers nowadays have to quote the more meaningful net horsepower figures for their products.
The gross horsepower figure was what American car manufacturers used to quote in the old "muscle car" days, these values being designated as "SAE bhp" to distinguish them from the net figures, if I remember correctly.
