Nissan 108ci Engine Specs

Bore, stroke, displacement and compression for all 2 Nissan 108ci engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	108 ci
Cylinders	4
Bore	3.150–3.346"
Stroke	3.071–3.465"
Compression	8.5–9.5:1
Advertised power	100–126 hp
Years	1974–2006

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
QG18DE	108 ci	3.1496" × 3.4646"	9.5:1	126
L18	108 ci	3.3465" × 3.0709"	8.5:1	100

Factory cars with a Nissan 108ci

• Nissan Datsun / Nissan Pickup: 1974, L18, 100 hp
• Nissan Sentra: 2000, 126 hp; 2001, 126 hp; 2002, 126 hp; 2003, 126 hp; 2004, 126 hp; 2005, 126 hp; 2006, 126 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.

The family mixes oversquare and undersquare designs, so members behave quite differently despite sharing a name.

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 Nissan engines