Diesel engines: better low-end torque?

I had always thought Diesel engines had better low-end torque. Don't they also generally get better MPG than a similar gasoline engine? Another plus would be no ignition system.

-Bill (remove "botizer" to reply via email)

Reply to
Wblane
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Reply to
L.W.(ßill) Hughes III

Charokees were availble in the early 80's with a turbo diesel. Read up on VW's line of diesels. They meet all federal laws on emmissions. There will be a problem meeting them with our current fuel in 2005. We're supposed to get low sulpher fuel, like Europe, in 2006. That's if they don't give into the trucking industry. Then ALL diesels, even the smoky ol Mack trucks, will be instantly cleaner. America has a love affair with gasoline engines because of cheap gas. What too many people don't realize there's sulpher in gasoline too.

Joe

Reply to
Jo Bo

Are you being an ass on purpose?

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Wblane wrote:

Reply to
Mike Romain

Bill has a mental defect. The EPA does not differentiate its engine standards "because they're small" . VWs TDi is cleaner than the Cummins ISB, Ford PowerStroke, or even the GM Isuzu Duramax. He doesn't have to like diesel engines, but he can't kick them out of the newsgroup. As long as we are not SPAMMING or posting gratuitously libelous or seditious messages, we have a right to state our opinions. Who died and made this failed gas station owner the net czar???

Reply to
Ted Azito

I'm in favor of ULSD, in fact, I think the Army has the right idea: JP-8. It's #1 ULSD with the freeze point and some other heavy metals tightly controlled.

Reply to
Ted Azito

I was just asking an honest question. I had always heard diesel engines had better low-end torque and got better MPG than similar gas engines. All I wanted to know was whether it was true or not. I remember the huge flame war a while back but these two issues weren't addressed by anyone in that flame war.

-Bill (remove "botizer" to reply via email)

Reply to
Wblane

The Liberty will Be offering a Diesel in 05

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Reply to
HarryS

Reply to
L.W.(ßill) Hughes III

As a rule, Diesel fuel contains more energy than Gasoline fuel, gallon for gallon. (or litre for litre)

Reply to
F. Robert Falbo

Reply to
L.W.(ßill) Hughes III

Diesel engines do have better low-end torques but a much lower max RPM (often limited to 4-5000). You get better MPG as well for two reasons: Diesel holds more energy per gallon and diesel engines can exploit it better due to the higher compression. Both combined get a 30% improvement. When I overtake a car with my 120HP 2.0 gasoline car I'll switch back a gear to start at around 3000 rpm when accellerating and will top out around 6000 rpm. With the diesel car I'll start at 2000 rpm and will top out at 4000 rpm. The net performance effect is the same. Both cars weigh about the same (1400kg). The gasoline car gets 27MPG, the diesel is at

40MPG. To be fair it has to be said that the gasoline car has around 100kMiles while the diesel is at 20k.

On the pollution front the main problem is the high sulfur content of diesel in the US. It also looks like that the way the EPA measures pollution puts disels at a disadvantage (diesels produce more of what the EPA judges worse and less of what is sanctioned less severely).

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has a good overview). Markus

Reply to
Markus Baertschi

I was in San Diego last weekend and drove my dad's "new" 92 Dodge turbo-diesel pickup. Unlike my vw, it blows one hell of a cloud when you stomp on it, but since it is only intended to be used 2 to 3 times a year towing an 8000+ Lbs trailer, it's pollution is insignificant. As to the initial question, in comparison of equal displacement gas and diesel engines, the diesel will produce more torque, less horsepower, and burn less fuel. The diesel will be capable of pulling heavier loads, if geared equally, but the gas engine will accelerate better.

Reply to
Paul Calman

A third advantage is that engine longevity on Diesels is almost inevitably better-a lot better-than gasoline engines. Most of the indirect injection mechanical diesels sold in cars and light trucks far outlived the chassis in which they were sold. The Benz engines are the only ones commonly left, aside from a few VWs.

Reply to
Ted Azito

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Are you willing to pollute our air for the difference? > God Bless America, ßill O|||||||O

Bill is, as long as he can do it wholesale with an 855 Cummins. Or a carbureted gas burner in his flatfender. But YOU....

Reply to
Ted Azito

Reply to
L.W.(ßill) Hughes III

The JEEP Website doesn't say what engine this is but it appears to be a VM. The upside is that they have a great rep for reliability: they are however an all-electronic engine. I want a mechanical diesel, which is why I'm looking into importing a 4.2 liter Nissan-apparently it's the same Mopar bolt pattern as the SD33/CN6-33 and, the most common sump and pickup are in the back. Apparently Aussies have put them in CJs already, so I should be able to benefit from their experience.

I really look forward to seeing these little buggers at America's truck stops.

Reply to
Ted Azito

Have one already, been here in the UK for a couple of years, I can highly recommend it. I get around 30 to the imperial gallon (about

25 to the US gallon). It's amazingly quiet, the only time you really notice it's a diesel is when it's idling. The diesel is ultra low sulphur over here so it's no more polluting than a petrol engine, but considering the MPG difference then clearly it is better.
Reply to
AK

(website showing Diesel has 12% more energy/gal than gasoline)

12% is BARELY??? I wouldn't mind getting "barely" more fuel mileage in my Jeep, or "barely" more money in my paycheck,...

Jeep seems to think they can meet the standards. They must not read this newsgroup, eh? I still think you should call them and offer your expertise. I'm sure your anecdotal evidence of diesel problems would make for some lively coffee break humor. :P Heck, I'll even join in with my explainations why different diesels smell differently,... like how some trucks smell like they're burning orange peel oil. ;)

Reply to
F. Robert Falbo

Reply to
L.W.(ßill) Hughes III

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