What engine is installed in the Porsche Mission S?

My prediction is a 4.8-liter horizontally opposed 8-cylinder twin-turbo engine.

This time, we're talking about Porsche's Mission S, which was announced on October 15, 2026.

At the time of this announcement, specific specifications of the powertrain, such as the type and displacement of the engine, were not revealed.

Therefore, we don't know what kind of powertrain will be installed in this car... or in the mid-engined supercar positioned above the 911 that will be based on the vision of this car.

Therefore!

Here are my personal predictions.

Whether it's accurate or not is up to Porsche (in other words, it's just my wild guess, so I'd appreciate it if you took it with a grain of salt... or rather, even less than half ^^).

My prediction is that it will be a mid-engine model equipped with a 4.8-liter horizontally opposed 8-cylinder engine (twin-turbo).

of foreign mediaRoad & TrackAccording to reports, the first thing that can be said for certain from the Porsche CEO's statements at the announcement of the Mission S is that, at this time, an EV version is not being considered for this new supercar platform.

Furthermore, this platform is highly flexible, and its powertrain can accommodate pure internal combustion engines (ICE), hybrid vehicles, or plug-in hybrid vehicles, and it can also accommodate either a PDK or a manual transmission.

The specific specifications to offer will be decided based on customer demand (according to the Porsche CEO).

Furthermore, according to media reports, when the Mission S entered the stage for the announcement, it was said to have "a distinctive sound very similar to a boxer engine."

I haven't actually heard this myself, but if it's the opinion of someone who has worked in the automotive media, it might not be so far off the mark.

AfterRoad & TrackSo, the four tailpipes on the Mission S model suggest it has an 8-cylinder engine (not that four tailpipes necessarily mean it's an 8-cylinder, but that's what it says).

However, other mediaAutocarTherefore, it is said that a V8 engine would be the most logical choice for the new mid-engine top-of-the-line model.

This is suggested by the extreme styling of the large cooling fan attached to the engine cover of the Mission S, which is said to be inspired by the one installed in the 917 (but I think the 917 has a 12-cylinder engine, so I don't quite understand why this fan would suggest a V8??).

While various theories have been put forward, such as it being a horizontally opposed engine or a V8 engine, the reason I thought it might be a horizontally opposed 8-cylinder engine is...

First of all, if it's a Porsche model positioned above the 911, which simply has a horizontally opposed six-cylinder engine (and a mass-produced model at that), I thought they would stick to a horizontally opposed engine as well.

And another reason is the B8, a test car based on the CTR3, which was unveiled in the summer of 2026 by RUF, a car manufacturer also known for tuning Porsches.

This vehicle was equipped with a 4.8-liter horizontally opposed 8-cylinder twin-turbo engine that produced over 1,000 horsepower.

This fact has led to speculation that development work on mass-producible vehicles equipped with horizontally opposed 8-cylinder engines is likely well underway.

OtherAutocarAccording to the source, Porsche itself had actually tried this engine configuration in the past, creating a concept car called the 904 as a successor to the 918 Spyder.

This concept car was reportedly planned to be equipped with a 5.0-liter horizontally opposed 8-cylinder engine that would produce a maximum output of approximately 750 bhp and a maximum torque of 738 lb-ft.

Hmm? So, if Porsche is making it, wouldn't it be the "5.0-liter horizontally opposed 8-cylinder engine" they aimed for in the 904? That's what you're probably thinking, right?

No, that's not it.

I'm going with the same "4.8 liter" engine as RUF.

Because look, Porsche is shown in such an easy-to-understand way!

This hydraulic pressure display persistently shows "4.8" in press release photos and other materials from when the Mission S was announced.

Of course, it could just be a coincidence that I happened to use one that was exactly 4.8 bar.

However, Porsche has always been particular about the time displayed on the devices used in promotional photos and press releases, such as deliberately setting the clock to "9:11".

Would they really only show "4.8" in photos of that Porsche in so many different situations?

Furthermore...the leftmost meter display shows "482". Could this possibly mean "4.8 liters, twin turbo (2)" and thus "482" (a bit of a stretch, haha)? ? ↓

...So, my prediction is a 4.8-liter horizontally opposed 8-cylinder twin-turbo engine.

Oh, as usual, this is just my playful fantasy, so please don't believe it and just ignore it, hehe ^^

Source:
◆(Official) Porsche Mission S: the essence of the sports car reinterpreted
◆The Porsche Mission S Platform Is Ready for a Manual Transmission: CEO
◆The Porsche Mission S Heralds a Permanent Supercar Addition to the Lineup
◆Official: Porsche Mission S previews new flagship supercar
◆Porsche Is Officially Developing a Mid-Engine Supercar Above the 911
◆Wild new Ruf supercar packs 1000bhp flat-eight boxer engine

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