What engine came in a 1955 Chevy?
The engine most closely associated with the 1955 Chevrolet is Chevrolet’s new 265 cubic inch small-block V8, which powered many of the brand’s cars that year.
Chevrolet also offered the traditional 235 cubic inch inline-six (the so‑called Blue Flame six) for other models, making 1955 a pivotal year in which Chevy introduced its iconic V8 while still offering a proven six-cylinder option.
A landmark introduction: The 265 cubic inch small-block V8
The centerpiece of the 1955 lineup was the 265 cu in V8, Chevrolet’s first modern small-block V8. It represented a major leap in mass-produced performance and ease of production, helping set the template for American V8 engines for decades to come.
Key specifications and options for the 265 V8 included the following:
- Displacement: 265 cubic inches
- Bore and stroke: 3.75 inches bore × 3.00 inches stroke
- Configuration: all‑aluminum block design with overhead valve (OHV) V8
- Horsepower: roughly 162 hp in standard form, with around 180 hp available on higher-performance configurations or with certain carburetion/engine packages
- Drivetrain options: typically paired with a three‑speed manual or an optional Powerglide two‑speed automatic
In practice, the 265 V8 gave Chevrolets a noticeable performance boost and helped usher in the era of the modern American V8. It also established Chevrolet’s reputation for durable, builder-friendly V8 power that would grow in later years.
Other engine options in the 1955 lineup
While the 265 V8 stole the spotlight, Chevrolet continued to offer an alternative six-cylinder powerplant for buyers seeking economy and simplicity. The inline-six gave model variety and helped keep Chevrolets accessible across the range.
- 235 cubic inch inline-six (the "Blue Flame" six), delivering around 140 hp and known for smooth, durable operation
- Transmission choices across engines generally included a three‑speed manual, with an optional Powerglide two‑speed automatic on many trims
These options illustrate how 1955 represented both a leap forward with the new small-block V8 and continuity with Chevrolet’s trusted six-cylinder lineup.
Legacy of the 1955 engines
The 265 cu in small-block V8 laid the groundwork for Chevrolet’s enduring engine strategy: a compact, high‑piston‑count V8 design that was easy to produce and modify. It became the cornerstone of Chevrolet performance for years to come, influencing models well into the muscle-car era.
Summary
In short, a 1955 Chevrolet was most commonly powered by Chevrolet’s new 265 cubic inch small-block V8, with the traditional 235 cubic inch inline-six available on other models. The year marked a watershed moment in American automotive engineering, as Chevrolets with V8 power began a long-lasting trend toward performance and versatility in the brand’s lineup.
What year is the best Chevy 327 engine?
The best Chevy 327 engine year is widely considered to be 1965–1968, specifically the L79 version, which offered a great balance of performance and drivability. For a higher-performance, race-oriented engine, the 1964–1965 L76 and 1964–1965 L84 (fuel-injected) versions were the most powerful factory small-blocks of their time.
You can watch this video to learn about the L79's performance and its impact on muscle car history: 59sEngine LegendsYouTube · Jun 6, 2025
Best overall performance and drivability
- Years: 1965–1968
- Engine: L79
- Why it's the best: The L79 produced a potent 350 hp with a high-performance hydraulic camshaft, making it both powerful and streetable. It was a rocket from 2,400 rpm to 5,800 rpm and was available in a variety of GM vehicles, not just Corvettes.
This video explains the history and performance of the L79 engine, including its features and why it was a popular choice: 58sEngine LegendsYouTube · Jun 3, 2025
Best for pure factory horsepower
- Years: 1964–1965
- Engine: L76 (365 hp) and L84 (375 hp, fuel-injected)
- Why it's the best: These were the most powerful production small-blocks ever built until the 2001 LS6 came out. They featured a high 11:1 compression ratio and a solid-lifter "30-30" cam for maximum top-end power. However, they were less comfortable for daily driving than the L79.
Other notable versions
- 1962–1963: The 327 was first introduced, with versions available in 250, 300, and 340 horsepower ratings.
- 1967–1969: Later versions saw lower compression ratios and power ratings fade as Chevy focused on the new 350 cubic-inch engine. The 1969 model had a two-barrel carburetor and produced 235 horsepower.
What made the 1955 Chevy so special?
The introduction of the revolutionary small-block V-8 engine made 1955 a momentous year for Chevrolet. That engine quickly became the cornerstone of American high performance in all forms of racing and hot rods. The high performance aftermarket owes its existence to the 265-cubic-inch Chevy and its many derivatives.
What engine did a 1955 Chevy have?
OHV V8
OHV V8: 265 cubic inches, 180 brake horsepower (SAE), also known as the "Power Pack" engine.
What is the difference between a 55 Chevy 150 and 210?
The 150, 210, And Bel Air Models
But to narrow it down, the 150 was the base model with no side trim at all; the 210 was between the 150 and Bel Air, with trim behind the front door only; and the Bel Air had trim all the way down the side, from front fender to the quarter panel.
