What is the biggest gas engine Chevy makes?
The biggest gasoline-powered engine Chevrolet currently sells is the 6.6-liter V8, known as the L8T, used in Silverado and Silverado HD pickups. It produces about 401 horsepower and around 464 pound-feet of torque in standard gas form.
Displacement is the clearest way to gauge “biggest,” but buyers also weigh power, torque, and where the engine is used. This article surveys Chevrolet’s current large-displacement gas V8s, contrasts them with historically large Chevrolet engines, and explains what that means for trucks and performance models.
What Chevrolet offers today in big-displacement gas engines
Displacement versus performance in Chevy's V8 lineup
Below is a look at Chevrolet’s current gasoline engines with the largest displacements, focusing on where they appear and how they perform:
- 6.6-liter V8 gasoline (L8T) — the largest-displacement gas engine Chevy currently sells, used in Silverado 2500/3500 HD and related heavy-duty models; produces about 401 horsepower and 464 lb-ft of torque.
- 6.2-liter V8 gasoline (LT2) — a very strong option for lighter-duty pickups and performance variants; typically around 420 horsepower and 460+ lb-ft of torque.
In the current Chevrolet lineup, the 6.6L V8 represents the capstone for displacement in gasoline form, with the 6.2L V8 serving as Chevy’s next-step option for standard-duty trucks and sportier trims.
Historical context: Chevy's big-blocks and the modern era
Chevrolet has a storied history of large-displacement gasoline V8s, including legendary big-blocks. While the brand no longer sells a new, eight- or nine-liter gasoline engine for mainstream models, it maintains a lineage of powerful gases that inform today’s offerings. The most notable historically large gasoline Chevy engines include:
- 7.0-liter V8 (LS7) — used in older Corvette Z06 and related performance cars; a landmark engine for its time, but not in current production.
- 6.6-liter L8T — currently Chevrolet’s largest-displacement gas engine in regular production for trucks, underscoring a shift toward robust torque in heavy-duty applications.
These historical notes show how Chevrolet has evolved its strategy around power, efficiency, and emissions, while still delivering significant grunt with its latest 6.6L V8 and 6.2L V8 offerings.
Bottom line for buyers
For customers prioritizing raw displacement and torque in a gasoline engine, the Silverado HD’s 6.6-liter V8 (L8T) stands as Chevy’s flagship gas engine in current production, with the 6.2-liter V8 offering a very strong alternative for lighter-duty trucks and performance-oriented setups. Diesel options and turbocharged variants provide additional choices depending on hauling, towing, and efficiency needs.
Summary: Chevrolet’s biggest gas engine in production today is the 6.6-liter V8 (L8T) used in the Silverado and Silverado HD, delivering roughly 401 hp and 464 lb-ft of torque. Historically, Chevy did offer larger-displacement gas engines, but today the 6.6L V8 sits at the top of the lineup for gasoline-powered trucks, followed by the 6.2L V8 for broader applications.
Does Chevrolet have a 6.6 gas engine?
This 6.6 6 liter engine which is a little bit of an old. School design a push rod two valves per cylinder V8 engine cast iron block as I mentioned one of the most structurally overbuilt engines that
What is Chevrolet's biggest gas engine?
Chevy 632 is Chevrolet Performance's largest and most powerful crate engine ever offered as a production unit. With a displacement of 632 cubic inches (10.4 liters), this naturally aspirated big-block V8 is designed to deliver extreme horsepower for high-performance street or drag racing applications.
What is a 502 Chevy engine?
Chevrolet 502 cubic inch big block V8 is a powerhouse engine born from GM's legendary big block lineage. Designed primarily as a high-performance crate engine, it offers massive displacement and serious torque, making it a popular choice for muscle cars, hot rods, and truck builds.
What year 454 has the most HP?
The 1970 versions of the Chevrolet 454 were the most powerful, with the LS5 putting out around 360 horsepower and the LS6 delivering about 450 horses. The LS6 was phased out after 1971, and the LS5's power had dwindled to about 245 horsepower by 1973 thanks to stricter emissions control.
