Ford 239ci Engine Specs

Bore, stroke, displacement and compression for all 2 Ford 239ci engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	239 ci
Cylinders	6, 8
Bore	3.500–3.811"
Stroke	3.100–3.465"
Advertised power	130–193 hp
Years	1954–2007

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
EBU	239 ci	3.5" × 3.1"	—	130
Essex 3.9	239 ci	3.811" × 3.4646"	—	193

Factory cars with a Ford 239ci

• Ford Cars (1949–1954): 1954, EBU, 130 hp
• Ford Freestar: 2004, 193 hp; 2005, 193 hp; 2006, 193 hp; 2007, 193 hp

What varies across the family

Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.

All are oversquare — bore larger than stroke, which favours revs over low-end torque.

Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.

← All Ford engines