Audi rules out Diesel RS models

[MatskiMonk]

As far as I can tell then, the best sports car in the world will be an electic one that plays NASCAR engine noises through the stereo....

on that bombshell...

 

[Tornado]

I think you're disabled.

This gon' be good.

 

[daan]

I'm afraid you are wrong on that, it was at least a 12k mile service interval longer than some performance diesels. You might be thinking of the old original EVO400.
I brought it back as a new point was made on torque and I had that info from memory without having to look up a new bit of info.

Yeah, sorry, it was 5000miles, or 6 months. I don't recall a specific version of the FQ400 being mentioned. I can also provide a source.

What performance diesels have a service interval of less than 12000 miles?

I think you're disabled.

And that's enough of that.

 

[Omnis]

Well, you know, that's just, like, uh, your opinion, man.

 

[land sea air]

It seems this can be broken down fairly easily.

A modern turbo-diesel will almost always be heavier, pricier, and less powerful than a similar NA gas engine of similar displacement. However it will also Use considerably less fuel (of a type which in some countries costs less) have more torque and be far more reliable in the long run with the potential to be just as "clean" as well (though clean depends on the pollutants you're talking about)

"Fun" is a matter of opinion but plenty of people are going to agree that there are fun diesel cars out there.

 

[Stotty]

A modern turbo-diesel will almost always be heavier, pricier, and less powerful than a similar NA gas engine of similar displacement. However it will also Use considerably less fuel (of a type which in some countries costs less) have more torque and be far more reliable in the long run with the potential to be just as "clean" as well (though clean depends on the pollutants you're talking about)

Correction...

Likely that a diesel engine will have a similar or higher power output to a petrol engine of the same capacity, yet will have substantially more torque and will produce both power and torque at much lower engine revolutions and have >25% better economy... if the petrol engine is turbocharged, then it's likely that both power and torque will be much closer, but then the fuel consumption gap will widen.

Reliability of diesel vs petrol is unproven IMO... both have the capability to be both reliable or unreliable, depending on the manufacturer, not on the fuel type.


Overall, diesel is a better fuel for non-sports cars than petrol.

 

[tribolik]

Reliability of diesel vs petrol is unproven IMO... both have the capability to be both reliable or unreliable, depending on the manufacturer, not on the fuel type.

Sorry but that is proven - Diesel engines last longer simply due to the fact that they rev less - the less the revs the less the motor wears off - it is very simple to understand - like this - the more a wheel turns the more it wears off - the same happen with diesel engines and thats why they have longer service interval...

Some mercedes 190d can do up to 1 500 000 or more km (dont know what that is in miles) most petrol engines cant do half that Km

 

[Leonidae@MFT]

Sorry but that is proven - Diesel engines last longer simply due to the fact that they rev less - the less the revs the less the motor wears off - it is very simple to understand - like this - the more a wheel turns the more it wears off - the same happen with diesel engines and thats why they have longer service interval...

Some mercedes 190d can do up to 1 500 000 or more km (dont know what that is in miles) most petrol engines cant do half that Km

*cough* There's a certain Volvo P1800 that would like to talk with you about that..

 

[tribolik]

*cough* There's a certain Volvo P1800 that would like to talk with you about that..

Thanks thats what I was looking for...

...the exception that proves the rule

 

[land sea air]

Correction...

Likely that a diesel engine will have a similar or higher power output to a petrol engine of the same capacity, yet will have substantially more torque and will produce both power and torque at much lower engine revolutions and have >25% better economy... if the petrol engine is turbocharged, then it's likely that both power and torque will be much closer, but then the fuel consumption gap will widen.

Reliability of diesel vs petrol is unproven IMO... both have the capability to be both reliable or unreliable, depending on the manufacturer, not on the fuel type.


Overall, diesel is a better fuel for non-sports cars than petrol.

I don't think technology has reached the point quite yet where it is likely that the diesel will out power the gas models (remember I'm talking about the big picture here not just the best performing motors)

I do believe that the reliability issue is proven quite well, also it has as much to do with the fuel as the revs, diesel has lubricating qualities while gasoline does not.

 

[homeforsummer]

Sorry but that is proven - Diesel engines last longer simply due to the fact that they rev less - the less the revs the less the motor wears off - it is very simple to understand - like this - the more a wheel turns the more it wears off - the same happen with diesel engines and thats why they have longer service interval...

Some mercedes 190d can do up to 1 500 000 or more km (dont know what that is in miles) most petrol engines cant do half that Km

That's not quite true.

Modern turbodiesels actually tend to have slightly shorter service intervals than the equivalent petrol and need slightly more attentive care. This wasn't always the case with diesels as your Merc 190 example proves, but modern diesels are much more complex with their turbochargers and particulate filters, both of which add complexity to something that was originally pretty simple.

If well looked after a diesel will go on for longer than a petrol (economy isn't the only reason taxi drivers go for diesel - lifespans of 300,000 miles plus also play a part) - but they do need more looking after in the first place.

That servicing also helps keep them clean enough to pass emissions tests. Old diesels with poor maintenance are quite easy to spot, you just look for the clouds of black smoke pouring from them (step forwards, any 1990s Ford Transit). A badly maintained petrol will eventually just die. A badly maintained diesel can take a little more abuse and go on choking children for years to come

As for the topic at hand: No diesel Audi RSs suits me fine. It's not like there aren't plenty of other diesel Audis for people that way inclined so the lack of an RS version isn't a biggie. I'm not precious over the petrol/diesel debate but you can't really make a diesel RS that would sound quite as good as the old RS4's V8 or the TT RS's five-pot.

 

[tribolik]

I have a Citroen C2 HDI VTR and its turbo charged and it has a service interval of 20 000 km the equivalent in petrol has a service interval of 10 000 km

I can only judge by that if you show me your prove...

 

[land sea air]

I have a Citroen C2 HDI VTR and its turbo charged and it has a service interval of 20 000 km the equivalent in petrol has a service interval of 10 000 km

I can only judge by that if you show me your prove...

to be fair he is saying that they tend to have higher service interval, which is sometimes true especially here in the states where the cleanest most powerful diesels require extra care. However I think we are all in agreement that if looked after then they last longer.

 

[Famine]

I have a Citroen C2 HDI VTR and its turbo charged and it has a service interval of 20 000 km the equivalent in petrol has a service interval of 10 000 km

I can only judge by that if you show me your prove...

From Parkers:

Citroen C2 servicing:
Petrol 20,000 miles, Diesel 12,500 miles

Link.

The same PSA engines are used in the 207. From Peugeot UK's website:

207 petrol - 20,000 miles/2 years
207 1.4 HDi diesel - 20,000 miles/2 years
207 1.6 HDi diesel - 12,500 miles/2 years
207 1.4 HDi FAP - 12,500 miles/2 years

Link.

 

[tribolik]

That's not quite true.

Modern turbodiesels actually tend to have slightly shorter service intervals than the equivalent petrol and need slightly more attentive care.

Im kind of lost now - my car if from 2008 if that is not modern than what do you consider a modern car?
Im in europe and maybe here things are diferent or something

EDIT: your right Famine C2 HDI - 20000km C2 petrol 30000km I have a citroen service station just in front of my house and I just asked - but I used to have a 1998 fiesta 1250cc 16v (petrol) and it had do be revised every 10 000 - 15 000 km in ford so I was very happy when everybody told me that a diesel would be revised 1/2 the times and I took it for a fact...

My bad... twice in this thread... Im very sorry for missleading some of you... Ill just read from now on

 

[Stotty]

I don't think technology has reached the point quite yet where it is likely that the diesel will out power the gas models (remember I'm talking about the big picture here not just the best performing motors)

I think you'll find that in almost all cases the 2.0 diesel is at least as powerful as the equivalent normally aspirated petrol engine in most manufacturers ranges. A turbocharged petrol engine will most likely be more powerful though.

 

[land sea air]

I think you'll find that in almost all cases the 2.0 diesel is at least as powerful as the equivalent normally aspirated petrol engine in most manufacturers ranges. A turbocharged petrol engine will most likely be more powerful though.

Could you show me a good place to find this info? I'm not disagreeing but I am curious and Wikipedia is a bit tedious for something like this.

 

[Famine]

The thing to remember here is that the diesel cycle all but requires a turbocharger to function - and turbochargers effectively increase engine capacity.

A 2.0 petrol (Otto) engine is only equivalent to a 2.0 diesel engine if both are naturally aspirated. A 2.0 turbocharged petrol engine is only equivalent to a 2.0 turbodiesel engine if both have turbos with the same flow rate. Compared a 2.0 Otto to a 2.0 turbodiesel is comparing apples to unicorns.

 

[breakpoint]

I would love to see a gasoline powered F250 pull my trailer like my F250 PowerStroke did, actually I did see a guy try to pull it, didn't work out so well. That truck was the first diesel I had, and after it was chipped that thing pulled like there was no end to the torque. I was really shocked by how much of a difference the chip made, because in gasoline powered cars a chip really hasn't done much in the past for me, at all. I'm only speaking for american cars in this though, I don't know how well re-mapping works on foreign gasoline powered vehicles. For american gasoline powered cars the only thing it really does is take away the rev limiter and cut off.

 

[GT_Prologue5]

In my eyes diesel and petrol engines can't really be compared that well (obvious example is this thread.

Diesels are heavier, more complex, and most certainly stranger (not in Europe, of course), and come with buckets of torque while the gas engines are more powerful, but have less torque and more waiting for the powerband. They can't really be compared well due to the distinctions between how they operate and how they have to work, not to mention fuel efficiency. A good turbodiesel can compete with any sports car on the road. Seems like someone forgot that turns are where it's at.

Oxygen is more toxic than CO2.

Sorry, but just when you think you've seen it all.

 

[Carlos]

In my eyes, diesel is awesome. So powerful, don't need high revs, almost instant power and I like the sound of a powerful diesel engine! My mate has a Audi A6 ('09) 3.0 tdi with few mods, 278bhp and 710nm. On highway, low revs, little push on the gas paddle and your flying!