Honda 61ci Specs: 72 x 81.5 mm

Honda 61ci specs: 72 x 81.5 mm (2.8346 x 3.2087 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.

At a glance

Displacement	61 ci
Cylinders	3
Bore	2.835"
Stroke	3.209"
Compression	10.8:1
Advertised power	73 hp
Years	2000–2006

This engine

Engine	Displacement	Bore × Stroke	CR	HP
ECA1	61 ci	2.8346" × 3.2087"	10.8:1	73

Factory cars with a Honda 61ci

• Honda Insight: 2000, ECA1, 73 hp; 2001, ECA1, 73 hp; 2002, ECA1, 73 hp; 2003, ECA1, 73 hp; 2004, ECA1, 73 hp; 2005, ECA1, 73 hp; 2006, ECA1, 73 hp

What varies across the family

This family is represented by a single engine in the database: 61 ci, 3 cylinders, a 2.8346" × 3.2087" 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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