The horsepower of an LT1 engine varies on the model and type of car using it, thereby ranging between 275 and 285. General Motors created this small block engine in the 1990s; the LT1 is still in service to this day.
In 2014, General Motors designed and introduced a new LT1 flagship engine with up to 460 horsepower, and it was installed in the new Chevrolet Corvette. The LT1 V8 6.2 liter is a brand-new LT1 engine record; General Motors had designed its last incarnation of the LT1 engine in 1997. The LT1 engine is used in Firebirds, Corvettes, Roadmasters, Caprices, Impalas and Cadillac Fleetwoods.