LS1 vs LS3: What's the Difference?

The GM LS1 5.7L and the GM LS3 6.2L differ in displacement, bore × stroke, compression ratio, factory rating. The table puts the factory specs side by side; each engine's own page has the full specs.

Specs side by side

	GM LS1 5.7L	GM LS3 6.2L
Engine	GM LS1 5.7L	GM LS3 6.2L
Displacement	346.1 ci (5.67 L)	376.1 ci (6.16 L)
Bore × stroke	3.900" × 3.622"	4.065" × 3.622"
Cylinders	8	8
Compression ratio	10.1:1	10.7:1
Factory rating	305 hp–350 hp	415 hp–430 hp
Block	aluminum	aluminum
Heads	aluminum	aluminum
Rod length	6.098"	6.098"
Deck height	9.240"	9.240"
Weight (approx.)	425 lb–460 lb	—
Fuel	gas	gas
Model years	1997–2004	2008–2017

Where versions of an engine differ, the table shows the range across them. Ratings are the makers' published figures.

Which cars got each engine

GM LS1 5.7L	Years
Chevrolet Corvette	1997–2004
Chevrolet Camaro	1998–2002
Pontiac Firebird	1998–2002
Pontiac GTO	2004

GM LS3 6.2L	Years
Chevrolet Corvette	2008–2013
Pontiac G8	2009
Chevrolet Camaro	2010–2015
Chevrolet SS	2014–2017

More

• GM LS1 5.7L specs
• GM LS3 6.2L specs
• All engine comparisons