Pontiac 146ci Engine Specs

Bore, stroke, displacement and compression for all 2 Pontiac 146ci engines, compared side by side. Plus rod ratio and head specs where published.

At a glance

Displacement	146 ci
Cylinders	4
Bore	3.465–3.543"
Stroke	3.701–3.858"
Compression	10.4:1
Advertised power	150–177 hp
Years	1996–2009

Engines in this family

Engine	Displacement	Bore × Stroke	CR	HP
LD9	146 ci	3.5433" × 3.7008"	—	150
LE5	146 ci	3.4646" × 3.8583"	10.4:1	177

Factory cars with a Pontiac 146ci

• Pontiac Grand Am: 1996, LD9, 150 hp; 1997, LD9, 150 hp; 1998, LD9, 150 hp; 1999, LD9, 150 hp; 2000, LD9, 150 hp; 2001, LD9, 150 hp
• Pontiac Sunfire: 1996, LD9, 150 hp; 1997, LD9, 150 hp; 1998, LD9, 150 hp; 1999, LD9, 150 hp; 2000, LD9, 150 hp; 2001, LD9, 150 hp; 2002, LD9, 150 hp
• Pontiac Solstice: 2006, LE5, 177 hp; 2007, LE5, 177 hp; 2008, LE5, 177 hp; 2009, LE5, 177 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.

1 of 2 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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