Honda 107ci Specs: 77 x 94 mm

Honda 107ci specs: 77 x 94 mm (3.0315 x 3.7008 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.

At a glance

Displacement	107 ci
Cylinders	4
Bore	3.031"
Stroke	3.701"
Advertised power	72–75 hp
Years	1979–1983

This engine

Engine	Displacement	Bore × Stroke	CR	HP
EK1	107 ci	3.0315" × 3.7008"	—	72–75

Factory cars with a Honda 107ci

• Honda Accord: 1979, EK1, 72 hp; 1980, EK1, 72 hp; 1981, EK1; 1982, EK1, 75 hp; 1983, EK1, 75 hp
• Honda Prelude: 1979, EK1, 72 hp; 1980, EK1, 72 hp; 1981, EK1, 75 hp; 1982, EK1, 75 hp

What varies across the family

This family is represented by a single engine in the database: 107 ci, 4 cylinders, a 3.0315" × 3.7008" bore and stroke.

All are undersquare — stroke larger than bore, favouring torque low in the range.

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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