How much horsepower does a 1976 Chevy Laguna S3 have?
The 1976 Chevy Laguna S-3 with its 350 cubic-inch V8 was rated at about 180 horsepower (SAE net). This article explains the engine, the rating standard of the era, and what could cause variations in practice.
Overview of the Laguna S-3
The Laguna S-3 was Chevrolet's sport-oriented trim for the Laguna lineup in the mid-1970s. It emphasized styling cues and a more performance-focused powertrain for buyers seeking a slightly livelier coupe experience within a mid-size Chevrolets family.
Engine and power details
The following notes summarize the core engine and powertrain details commonly cited for the 1976 Laguna S-3.
- Engine: Chevrolet 350 cubic inch (5.7 L) V8 with a four-barrel carburetor.
- Power: 180 horsepower (SAE net) at roughly 4,000–4,400 rpm, depending on build and emissions equipment.
- Torque: Approximately 270–290 lb-ft of torque, providing solid mid-range performance for a mid-size Chevy of that era.
- Transmission: Typically paired with a three-speed automatic (Turbo-Hydramatic 350); manual transmissions were not commonly offered on this trim.
- Displacement and context: The 350 V8 used here was part of Chevrolet’s widely used 5.7 L family powering many models in the era.
These specifications capture the powertrain that underpins the Laguna S-3’s official horsepower figure and its everyday performance characteristics.
Understanding the rating in context
horsepower figures from the 1970s are grounded in SAE net testing, which reflects the car as it would be driven with standard equipment and emissions controls. This contrasts with earlier gross ratings and explains why some engines of the era show similar numbers despite apparent differences in tuning or weight.
Why numbers can vary
Variations in the Laguna S-3’s horsepower number can come from emission control equipment, exhaust configurations, and minor differences in production within the model year. While the official figure sits around 180 hp, real-world outputs on individual cars could shift slightly.
Notes on horsepower ratings from the era
During the 1970s, automotive manufacturers standardized horsepower measurements differently than in earlier decades. The shift to SAE net horsepower and changes in testing standards meant that published numbers for engines like the Laguna S-3’s 350 V8 were more consistent within the era, but still subject to fluctuation due to options and regional emissions requirements.
Summary
In summary, the 1976 Chevrolet Laguna S-3’s official horsepower is commonly cited as 180 hp (SAE net) from the 350 cubic inch V8. While this figure is a reliable baseline, actual performance can vary slightly based on engine build, emissions equipment, and other factory options. For collectors and enthusiasts, this rating reflects the Laguna S-3’s place in 1970s Chevrolet performance history.
