Porsche Cayenne concept improves fuel economy and CO2 emissions by 10 percent

Via friction reduction in the powertrain

CO2ncept-10% based on Porsche Cayenne
CO2ncept-10% based on Porsche Cayenne

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Comments (16)

newest first oldest first

CDspeed

All that and work and only 10%.

December 9, 2009 9:25 pm

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4 replies

scratchy996

it's a start

December 9, 2009 10:02 pm

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alex_w115

10% is HUGE

December 10, 2009 12:10 am

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Joe_Limon

I agree 10% is huge for friction improvement. But that 25-40% efficiency for internal combustion engines is mainly limited by thermodynamic laws, it is impossible to make any massive gains in thermodynamic efficiency as modern engines are already 95% of the way to their ideal efficiencies... all we really have left if changing the input conditions to better suit our needs.

December 10, 2009 12:55 am

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Joe_Limon

This also makes me wonder just how bad the regular Cayenne was if they were able to reduce it that much.

December 10, 2009 12:55 am

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out4ride

Cdspeed I guess you don't know that combustion engines are only 25 to 40 % efficient. If you think about it 10% is big gain. If you look at electric motors where they are around 90 to 99% efficient there is much more room to improve combustion ones.

December 9, 2009 10:48 pm

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nickmini

10% weight reduction on an elephant - it's still an elephant.

December 10, 2009 1:58 am

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awhk

Impressive, now need to test the durability of the Engine and roll it out to mass market.

December 10, 2009 7:39 am

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bmwaddict

My God this is an ugly car. 10% is a small figure.

December 10, 2009 1:04 pm

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1 reply

CarEnthusiast78

no its not.

December 10, 2009 9:28 pm

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sub39h

it would have been kinder to the environment to make the car 10% better looking PS i'm surprised at some of the stupidity on display by some of the comments on this article.

December 10, 2009 2:31 pm

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1 reply

fusion01

@sub39h: funny but also stupid if one considers the environment over a sense of humour :)

December 14, 2009 2:05 pm

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