Dodge 340ci Specs: 4.032 x 3.311 in

Dodge 340ci specs: 4.032 x 3.311 in (102.4 x 84.1 mm) bore and stroke, shared by all 4 versions. Displacement, compression and factory ratings.

At a glance

Displacement	340 ci
Cylinders	8
Bore	4.032"
Stroke	3.311"
Advertised power	240–290 hp
Years	1968–1973

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
H	340 ci	4.0315" × 3.311"	—	240–275
J	340 ci	4.0315" × 3.311"	—	290
340 4-bbl	340 ci	4.0315" × 3.311"	—	240–275
Dodge 340ci (1968–1973)	340 ci	4.0315" × 3.311"	—	240–275

Factory cars with a Dodge 340ci

• Dodge Dart: 1968, 275 hp; 1969, 275 hp; 1970, 275 hp; 1971, 275 hp; 1972, 240 hp; 1973, 240 hp
• Dodge Challenger: 1970, 275 hp; 1970, 290 hp; 1971, 275 hp; 1972, 240 hp; 1973, 240 hp
• Dodge Charger: 1971, 275 hp; 1972, 240 hp; 1973, 240 hp

What varies across the family

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.

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