Porsche EA825 4.0TT Specs: 86 x 86 mm (3.3858 x 3.3858 in), 493-729 hp

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Porsche EA825 4.0TT specs: 4.0L (243.9 ci) 8-cylinder, 86 x 86 mm (3.3858 x 3.3858 in) bore and stroke. Rated 493-729 hp, 2019–2026.

The Porsche EA825 4.0TT is exactly square — 3.3858" bore and 3.3858" stroke are the same — which splits the difference between a high-revving layout and a torque layout. The 3.3858" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 30.5 ci (500 cc).

It is one of 3 engines in the EA825 family, the largest at 243.9 ci. 20 factory variants share these dimensions, rated from 493 to 729 hp across 2019–2026.

Dimensions

Displacement243.9 ci / 4 L
Bore3.3858"
Stroke3.3858"
Cylinders8
ConfigurationV8
Compression ratio9.7–10.1:1 (published figures vary)
Bore/stroke ratio1

Construction

Block materialaluminum
Head materialaluminum
ValvetrainDOHC
Fuel typegas
Advertised HP493–729 hp
Years2019–2026

Factory ratings by year

YearVersionHP @ rpmTorque @ rpmComp.
2019EA825 4.0TT net541 @ 5750-6000567 lb-ft @ 1960-450010.1:1
2020EA825 4.0TT net541 @ 5750-6000567 lb-ft @ 1960-450010.1:1
2021EA825 4.0TT net541 @ 5750-6000567 lb-ft @ 1960-450010.1:1
2022EA825 4.0TT net541 @ 5750-6000567 lb-ft @ 1960-450010.1:1
2022EA825 4.0TT net631 @ 6000626 lb-ft @ 2300-45009.7:1
2023EA825 4.0TT net541 @ 5750-6000567 lb-ft @ 1960-450010.1:1
2023EA825 4.0TT net631 @ 6000626 lb-ft @ 2300-45009.7:1
2024EA825 4.0TT net650 @ 6000626 lb-ft @ 23009.7:1
2025EA825 4.0TT net493 @ 6000486 lb-ft @ 2100-45009.7:1
2025EA825 4.0TT net650 @ 6000626 lb-ft @ 23009.7:1
2026EA825 4.0TT net493 @ 6000486 lb-ft @ 2100-45009.7:1
2026EA825 4.0TT net650 @ 6000626 lb-ft @ 23009.7:1

Factory specification sheet.

What these numbers mean

Bore/stroke character1.000 — square — bore and stroke are within 5%, a balanced compromise
Mean piston speed at 6,000 RPM3,386 ft/min — conservative for a street engine
Displacement per cylinder30.5 ci

Run the numbers for this engine

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Variants sharing these dimensions (20)

These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.

YearAdvertised HPCode
2019541 hpEA825 4.0TT
2020—EA825 4.0TT
2020541 hpEA825 4.0TT
2021—EA825 4.0TT
2021541 hpEA825 4.0TT
2022—EA825 4.0TT
2022541 hpEA825 4.0TT
2022631 hpEA825 4.0TT
2023—EA825 4.0TT
2023541 hpEA825 4.0TT
2023631 hpEA825 4.0TT
2024—EA825 4.0TT
2024650 hpEA825 4.0TT
2025—EA825 4.0TT
2025493 hpEA825 4.0TT
2025650 hpEA825 4.0TT
2025729 hpEA825 4.0TT
2026—EA825 4.0TT
2026493 hpEA825 4.0TT
2026650 hpEA825 4.0TT

What cars have the EA825 4.0TT?

1 factory vehicle, 2019–2026. Each year opens that model's engine table.

Similar engines

← All EA825 engines