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Differences between LS1 and LT1

Differences between LS1 and LT1

Both the LS1 and LT1 engines are great options for a performance car, but there are some key differences between the two. The LS1 is a pushrod engine while the LT1 is an overhead valve engine. The LS1 also has aluminum heads while the LT1 has cast iron heads. These differences result in different power outputs and fuel economy.

What is LS1?

  • LS1 is a type of engine that was first introduced in the 1997 Chevrolet Corvette. LS1 engines are known for their high performance and fuel efficiency, and they have become a popular choice for muscle cars and other high-powered vehicles.
  • LS1 engines are built using lightweight materials and feature a number of design innovations that increase power and improve efficiency. For example, LS1 engines use aluminum cylinder heads and pistons, which help to reduce weight and increase airflow.
  • Additionally, LS1 engines feature pop-up pistons, which allow for higher compression ratios and more power. Pop-up pistons also help to prevent engine knock, allowing LS1 engines to run on lower-octane fuel without compromising performance. Overall, LS1 engines offer an excellent combination of power, economy, and durability, making them a popular choice for many drivers.

What is LT1?

LT1 is a high-performance gasoline engine that was produced by Chevrolet from 1992 to 1997. The LT1 was introduced in the 1992 Corvette and was also used in a number of other GM vehicles, including the Camaro, Firebird, and Caprice. The LT1 was a significant improvement over previous Chevrolet engines, offering more power and better fuel economy. The engine was eventually replaced by the LS1 in the 1997 Corvette. Today, LT1 engines are still highly sought-after by performance enthusiasts due to their potential for high power output.

Differences between LS1 and LT1

  • LS1 and LT1 engines are both V8 gasoline engines that were produced by General Motors. LS1 engines were produced from 1997 to 2004, while LT1 engines were produced from 1992 to 1997. LS1 engines are typically found in Corvettes and Camaros, while LT1 engines are typically found in Impalas and Caprices.
  • Both LS1 and LT1 engines have a bore of 3.89 inches (99 mm) and a stroke of 3.62 inches (92 mm). LS1 engines have a compression ratio of 10:1, while LT1 engines have a compression ratio of 9.5:1.
  • LS1 engines produce more power than LT1 engines, with peak power output coming in at 345 hp (257 kW) at 5,600 rpm for the LS1 engine and 260 hp (194 kW) at 5,000 rpm for the LT1 engine. LS1 engines also have a higher redline than LT1 engines, with the LS1 engine’s redline coming in at 6,300 rpm and the LT1 engine’s redline coming in at 5,800 rpm.


An LS1 engine is a great option for those looking for more torque and horsepower. If you are looking to buy a new car, we recommend the LT1 engine. It provides great fuel economy and plenty of power. Both engines offer unique benefits that are sure to please drivers of all ages.

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