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Subscribe to this threadPorsche warming to diesels
(Page 1 of 1)
71cuda @ Mar 2nd 2008 12:48PM
If Audi's will have a 758 ft/lb V12, then Porsche will need a 1000 ft/lb W16 to upstage Audi properly.
zamafir @ Mar 2nd 2008 12:56PM
... yes because porsche's always been about paper numbers and not a cogent package et-al O_o.
rgseidl @ Mar 2nd 2008 3:14PM
Porsche isn't doing this to compete against Audi on the ueber-SUV front. After all, it owns 31% of Audi via its stake in VW AG. Rather, the diesel Cayenne is supposed to improve the company's fleet average CO2 emissions rating, which the EU is looking to set at 120-130g/km as soon as 2012, with heavy fines for every gram over the limit.
That is why Porsche is rumored to have selected the next iteration of Audi's 3.0L V6, which will deliver over 300hp. BMW already achieves such power densities with its sequentially boosted inline six, so it is likely Audi will be using the same strategy to uprate its own design. It's quite likely that a T2B5 version with urea injection for the US market is in the works as well, though there has been no official announcement to that effect.
http://automobilwoche.de/apps/pbcs.dll/article?AID=/20080229/REPOSITORY/539137949/1005/REPOSITORY
It's highly unlikely Porsche would choose to offer VW's old V10 diesel, as it's heavy, relatively thirsty and based on unit injector technology. Audi has long been using common rail and, the VW brand decided a while back to switch to it as well - the 2.0L mill in the Tiguan is the first example. Third generation common rail supports pressures of up to 2000 bar and multiple injections per combustion cycle, so emissions and NVH behavior can be optimized simultaneously throughout the engine map.
why not the LS2LS7? @ Mar 2nd 2008 6:20PM
BMW's inline 6 does not use a sequential turbo system, it uses a parallel turbo system (and for no reason that I can see).
MikeW @ Mar 2nd 2008 7:44PM
BMW's diesel.
BMW diesel operates serially at low speeds, and then it transitions to is large turbo at the top end.
It is serial-sequential.
BMW's gasoline engine is parallel twin turbo.