Stuttgart's track-ready 911 is highly likely to receive the same 503bhp unit as the limited-run 991 Speedster

The new 911 Speedster’s heavily revised 4.0-litre flat-six engine will be carried over to future GT models as Porsche’s GT division persists with naturally aspirated engines. 

GT boss Andreas Preuninger said: “We’ve invested in the future with this engine. I can’t comment on future projects but we would be stupid not to re-use this engine somewhere. 

“Our philosophy in GT cars is to stay naturally aspirated. We want to keep that engine for the future and that’s why we’ve made such a tremendous effort to get the engine right without taking emotion and performance away.”

Preuninger declined to reveal which models would use the updated engine, but a strong likelihood is the next-generation GT3. Recently spied prototypes at the Nürburgring Nordschleife emitted the telltale wail of a high-revving engine free from turbocharging, adding further weight to the speculation. 

The Speedster, a swansong for the 991 generation of the 911 priced from £211,599, uses the same powertrain as the outgoing GT3 but receives a host of updates. 

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Chief among the updates, and in order to extend the regulatory life of this big-capacity direct-injection flat six, Porsche has fitted two sizeable petrol particulate filters – one integrated into the exhaust tract that exits each side of the block.  

And yet owing to the use of thinner steel, nickel and soldering techniques rather than welding, the exhaust system now weighs 10kg less than before, despite the additional hardware. Power has also increased, from 493bhp to 503bhp, and continues to arrive at 8400rpm.

To achieve this with an engine that is not only cleaner but also suffers from an increase in exhaust back-pressure owing to the new filters is no mean feat.

The fuel-injection system now operates at 250bar rather than 200 for improved propagation, and each of the engine’s six cylinders now gets a dedicated throttle-body. The combined effect – but particularly due to the new throttle-bodies – is even sharper throttle response, says Porsche. 

Rachel Burgess and Richard Lane

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Comments
10

10 May 2019

Porsche GT3 or Tesla Model S.....Hmm, let me see. And for you Tesla fanboys no, the Tesla is not quicker, faster etc.

10 May 2019

Emm no mention of Tesla up until your post, then you insult people who like the car and make a irrelevant comparrasion to insult the company.

typos1 - Just can’t respect opinion

10 May 2019
Boris9119 wrote:

Porsche GT3 or Tesla Model S.....Hmm, let me see. And for you Tesla fanboys no, the Tesla is not quicker, faster etc.

A little Italian with a V10 in the back......begins with an L.......?

Peter Cavellini.

10 May 2019

No argument there Peter, it gets a seat at the table unlike the Model S! Rounded individuals familiar with this website will know I have praised Tesla for dragging Porsche and all other legacy manufacturers into the electric future, but this is a table reserved for engineering excellence and driver emotion, and consequently there can be no place for Tesla.

2 August 2019

I love Porsche cars and Porsche GT3 is my all-time favorite model. 

Www.Global.Subway.Com

10 May 2019

 Yes, there is no comparison, one is a sports car the other isn’t, or, is that too obvious?

Peter Cavellini.

10 May 2019

'Next-gen 911 GT3 tipped to use 4.0 Flat 6'.  Now that is the definition of a speculative tip.

 

Very pleased indeed that it isn't going to be cocked up with turbos.

11 May 2019
eseaton wrote:

'Next-gen 911 GT3 tipped to use 4.0 Flat 6'.  Now that is the definition of a speculative tip.

 

Very pleased indeed that it isn't going to be cocked up with turbos.

In these days of "save the climate" craze it is!

Besides, Porsche also surprises to the negative sometimes. Let us see how long they will be able to keep the classic engine configuration rolling off the line. The prices of these cars are way up now, compared to a decade ago, Porsche probably (not sure) pays for the exhaust gas (it must be 250-300g CO2/km) now.

11 May 2019

The Carrera should have a NA flat 6 too...

 

11 May 2019
david RS wrote:

The Carrera should have a NA flat 6 too...

 

Porsche are past masters at creating multiple flavours of 911, to suit all sorts of owners

Having invested in the 3.0L turbo engine in the 991.2 and upgraded it in the 992, I believe they will stick with it for 'normal' Carrera cars and continue to use the NA engines for GT cars, engineering in hybridisation to both in the next few years.

Nevertheless, if as some suggest, the NA engine is fitted to the Boxster/Caymen (where the 3.0L turbo motor won't fit), I wouldn't rule out a heritage themed, NA engined 992 model for the 'purists', to sit between the Carrera and GT, one that is less track focussed and more like an RS Touring. No doubt it would be dearer than a 4S but less than a GT model - with all the engineering already done, it would just mean more profit for Porsche and give those of us who want one, an road-biased NA 911 once again - until then I'll stick with my 991.1, as for the money no other Porsche comes close to the sound it makes with the PSE open.

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