Porsche DWNA Specs

Porsche DWNA engine specs: 243.8 ci (4L), 8-cylinder, 3.3858" bore x 3.3858" stroke, 10.1:1 compression.

Dimensions

Displacement243.8 ci / 4 L
Bore3.3858"
Stroke3.3858"
Cylinders8
Compression ratio10.1:1
Bore/stroke ratio1

Construction

Block materialaluminum
Head materialaluminum
ValvetrainDOHC
Fuel typegas
Advertised HP550 hp

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
Static compression10.1:1 — in the range that usually runs on pump premium

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