Ls1 Vs. Ls4 Engines


Chevrolet's LS1 and LS4 engines are third- and fourth-generation small-block, large-displacement engines that were mainly installed in high-performance vehicles. They feature aluminum blocks to reduce weight and a racing-inspired design to create more horsepower.

LS Engine Series

  • Introduced in 1997, when the LS1 was first offered in Corvette, Camaro, Firebird and GTO models in the United States, the LS engine series also includes the LS2, LS3/L99, LS4, LS6, LS7, LS9 and LSA engines, which have displacements ranging from 5.3 to 7.0 liters.


  • A 5.7-liter, or 346-cubic-inch, engine, the LS1 was produced from 1997 to 2004 in the United States and into the 2005 model year in other countries, such as Australia. It produced 350 horsepower and 365 pound-feet of torque.


  • Available in the front-wheel drive Chevrolet Impala SS and the Pontiac Grand Prix GXP, the LS4 shared the same aluminum block as the LS1 and had modifications to allow it to be mounted transversely. A 5.3-liter engine, it produced 303 horsepower and 323 pound-feet of torque.

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