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Re: engine RPM and gas consumption
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CarGuru > Driving > Re: engine RPM and gas consumption 17 February 2005 14:58:44
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Re: engine RPM and gas consumption

223rem 17 February 2005 03:27:48
 Magnulus wrote:
There are roads with 55 mph speed limits that could get there in a> roundabout way. Some of them have a very dangerous reputation- single-lane> highways where occasionally some idiot tries to pass, despite the signs.

That is most likely your fault. Those roads are grossly undersposted at 55.
One could easily do 70 mph on them--unless, of course, there is a an idiot
slowpoke ahead that cruises at 55 mph. If you're in no hurry to get anywhere
dont assume others arent.
Add comment
Thomas Schäfer 17 February 2005 14:58:44 [ permanent link ]
 "Magnulus" wrote
I'd be curious to know what a Honda Civic Hybrid or> Prius gets doing the same route.

About the same.
Hybrids perform in city driving with many stops and accelerations.
The Prius is also good on the highway due to his
very low air drag (cw=0.26).
With the same size and shape, the diesel engine would be
more efficient at constant highway driving.

With fuel efficient driving (in the test cycles the inspectors
have to shift quite inefficient) you can save especially in
city driving. The Prius does it for you automatically.
From what I've read of the European Volkswagen diesels, blasting down the> expressway or autobahn 120 kmh (about 75 mph?) or more, seems to burn as> much fuel as congested city traffic.

Typical consumption according to EU-Norm city is 6 l / 100 km (39mpg),
but this test cycle does not represent really congested city driving.
(But, as mentioned above, inefficient shifting.)

And as you have experienced, 6 litres are also typical for about 120 kmh
or "Richtgeschwindigke­it" (130kmh).

With my previous Opel Astra station wagen (direct injection 75hp diesel)
I had an average of 4.6 litres over 135000km. 51mpg! :-)­

Thomas


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Magnulus 17 February 2005 18:52:58 [ permanent link ]
 
"Thomas Schäfer" <thomas.schaefer@ak­ademische.de> wrote in message
news:cv1tb5$8j6$1@g­inkgo.she.de...> With my previous Opel Astra station wagen (direct injection 75hp diesel)> I had an average of 4.6 litres over 135000km. 51mpg! :-)­

You can't get new cars with small engines like that anymore in the US. I
think the 90 horsepower of the Volkswagen TDI is about as low as it goes.
Even cars like the Scion xA (a Toyota Echo hatchback) have 110 horsepower
engines. The Honda Civic Hybrid does have about 93 horsepower, total, as
well. It's astounding considering cars in the past had lower horsepower
and seemed to suite people well enough- the early VW Beetles had 25
horsepower, and the early Honda Civic in the US had 45 hp.


Add comment
Thomas Schäfer 17 February 2005 20:55:14 [ permanent link ]
 "Magnulus" wrote
[75hp car]> You can't get new cars with small engines like that anymore in the US.

The new model has at least 80hp. 4 diesel engine types up to 150hp.
And 5 petrol from 90 to 200hp. And it is much bigger than the
previous model (452cm instead of 429cm in length, ...).
Why forcing the customers to take a big engine, even the smallest
is good enough for 168kph!?
the early VW Beetles had 25 horsepower,

Really? We have the modell "Beetle" in Germany too, but it is a quite new
one
with much more hp. Or do you mean its archetype "Käfer" from 1946?

Thomas


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Magnulus 18 February 2005 06:12:08 [ permanent link ]
 
"Mike Z. Helm" <mhelm@not.known> wrote in message
news:tgda11lcpgi479­bvbq3onl5naf4nhd6i1a­@4ax.com...> I suppose it could be that 75 is too much for your car and that its> mileage at that speed really is worse than stop-and-go driving, but I> doubt it.> Stop-and-go driving really sucks down the gas mileage usually, although> it does help if you don't stop all the way and your go is very slothful.

Diesels suppossedly don't consume as much fuel at idle (the engine idles
at around 400 rpm). I think a small engine consumes around a half gallon
per hour.


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CarGuru > Driving > Re: engine RPM and gas consumption 17 February 2005 14:58:44
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