Porsche 9A2 Evo Specs: 91 x 76.4 mm (3.5827 x 3.0079 in), 379-473 hp

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Porsche 9A2 Evo specs: 3.0L (181.9 ci) 6-cylinder, 91 x 76.4 mm (3.5827 x 3.0079 in) bore and stroke. Rated 379-473 hp, 2020–2026. Used in the Porsche 911.

The Porsche 9A2 Evo is oversquare — the 3.5827" bore exceeds the 3.0079" stroke by 19.1% — a layout that favors airflow and RPM over leverage at the crank. The 3.0079" stroke does not reach 4,000 ft/min of mean piston speed until about 8,000 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.3 ci (497 cc).

It is one of 3 engines in the 9A2 family, all of them 181.9 ci — the differences between them are in compression, heads and rating, not displacement. 17 factory variants share these dimensions, rated from 379 to 473 hp across 2020–2026.

Dimensions

Displacement181.9 ci / 3 L
Bore3.5827"
Stroke3.0079"
Cylinders6
Bore/stroke ratio1.191

Construction

Block materialaluminum
Head materialaluminum
ValvetrainDOHC
Fuel typegas
Advertised HP379–473 hp
Years2020–2026

What these numbers mean

Bore/stroke character1.191 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves
Mean piston speed at 6,000 RPM3,008 ft/min — conservative for a street engine
Displacement per cylinder30.3 ci

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Variants sharing these dimensions (17)

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

YearAdvertised HPCode
2020379 hp9A2 Evo
2020443 hp9A2 Evo
2021379 hp9A2 Evo
2021443 hp9A2 Evo
2022379 hp9A2 Evo
2022443 hp9A2 Evo
2022473 hp9A2 Evo
2023379 hp9A2 Evo
2023443 hp9A2 Evo
2023473 hp9A2 Evo
2024379 hp9A2 Evo
2024443 hp9A2 Evo
2024473 hp9A2 Evo
2025388 hp9A2 Evo
2025473 hp9A2 Evo
2026388 hp9A2 Evo
2026473 hp9A2 Evo

Factory cars with this engine

Similar engines

← All 9A2 engines