9 forgotten engines mechanics still praise today

Adrian Estremos

09/09/2026

9 forgotten engines mechanics still praise today — Image Credit: Nathanael Burton, CC BY-SA 2.0, via Wikimedia Commons

Throughout automotive history, several engines have made a lasting impact, yet many remain uncelebrated today. Mechanics often reminisce about these forgotten powerhouses, recalling their reliability, performance, and unique engineering. Here are nine engines that, despite being overshadowed by modern counterparts, still hold a special place in the hearts of automotive enthusiasts.

The Ford Flathead V8

The Ford Flathead V8, introduced in 1932, is often regarded as the engine that revolutionized automotive performance in America. Its simple design and lightweight construction allowed it to deliver impressive power for its time. Mechanics appreciate how the Flathead became a favorite among hot rodders, leading to its extensive modification potential. This engine powered iconic models such as the 1932 Ford Model B, which became synonymous with the classic American car culture.

Despite its age, the Flathead’s enduring popularity is evident in the numerous restoration projects and racing events dedicated to it. You can find a fascinating look at its legacy in this video, showcasing its influence on the automotive landscape.

The Chevrolet 350 Small Block

Image Credit: Mr.choppers - CC BY-SA 3.0/Wiki Commons — Image Credit: Mr.choppers – CC BY-SA 3.0/Wiki Commons

Launched in 1967, the Chevrolet 350 Small Block has earned a reputation as one of the most versatile and widely used engines in automotive history. Known for its robust performance and adaptability, mechanics often praise it for fitting into various vehicle models, from sports cars to trucks. The 350’s design allows for easy upgrades, making it a favorite among enthusiasts and professional builders alike.

Its legacy continues in various racing circuits and street builds, where its performance is still sought after today. For an in-depth look at its capabilities, check out this video that highlights the enduring appeal of the Small Block 350.

The Chrysler Hemi

Image Credit: Triple-green - CC BY-SA 2.0/Wiki Commons — Image Credit: Triple-green – CC BY-SA 2.0/Wiki Commons

The Chrysler Hemi engine, first produced in 1951, is celebrated for its unique hemispherical combustion chambers that optimize airflow and increase power. This innovative design set it apart from its contemporaries, making it a favorite among muscle car aficionados. Mechanics often commend its durability and the thrilling performance it delivers, particularly in models like the Dodge Charger and Plymouth Barracuda.

The Hemi’s legacy is not just confined to the drag strip; it’s also a symbol of American muscle. Enthusiasts can explore its storied past through various restoration projects that celebrate its engineering marvel.

The Volkswagen Type 1 (Beetle) Engine

Volkswagen Beetle Air-Cooled Engine — Image Credit: Cjp24 – Own work, CC BY-SA 4.0, via Wikimedia Commons

The Volkswagen Type 1 engine, commonly known as the Beetle engine, was a simple yet effective air-cooled flat-four engine introduced in 1938. Its compact design and reliability made it the heart of one of the best-selling cars of all time. Mechanics appreciate its ease of maintenance and the vast community of enthusiasts dedicated to preserving and restoring these iconic vehicles.

Many still celebrate the Beetle for its unique character and the nostalgic charm it brings to the road. The enduring popularity of this engine is reflected in numerous restoration videos that highlight its significance in automotive history.

The BMW M30 Straight-Six

The BMW M30 straight-six engine, produced from 1968 to 1994, is renowned for its smooth power delivery and robust construction. This engine powered a variety of BMW models, including the E12 5 Series and the E28 M5, earning a reputation for reliability and performance. Mechanics admire the M30 for its engineering excellence, allowing for significant power upgrades while maintaining its inherent balance and refinement.

Today, the M30 is a popular choice for classic car enthusiasts and tuners alike, often found in various builds and restorations. Its legacy continues to inspire a new generation of automotive fans eager to appreciate the art of engineering.

The Toyota 22R Inline-Four

1989 Toyota Hilux SURF 4x4 engine — Image Credit: dave_7 – originally posted to Flickr as 1989 Toyota Hilux SURF 4×4, CC BY 2.0, via Wikimedia Commons

The Toyota 22R inline-four engine, produced from 1981 to 1995, is celebrated for its simplicity and reliability. Known for its ease of maintenance, mechanics often highlight the 22R as a workhorse engine, powering popular models like the Toyota Pickup and 4Runner. Its robust design allows for extensive modifications, making it a staple in the off-road community and among enthusiasts looking to enhance performance.

The 22R’s popularity is reflected in its long-lasting presence in the aftermarket scene, with parts readily available for repairs and upgrades. Its reputation for durability ensures that it remains a favorite among those who appreciate reliable engineering.

The Nissan RB26DETT

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The Nissan RB26DETT is a legendary inline-six engine first introduced in the Nissan Skyline GT-R in 1989. Known for its high-revving capabilities and solid construction, it quickly gained a reputation in the tuning community. Mechanics praise the RB26DETT for its performance potential, with many successful builds pushing well over 1,000 horsepower.

This engine has become a cornerstone of the JDM scene, with enthusiasts constantly seeking to unlock its full potential. Its storied history in motorsports, particularly in the Japanese Super GT series, cements its status as an iconic engine in automotive culture.

The Jaguar XK Inline-Six

Jaguar XK engine — Image Credit: No machine-readable author provided. Sfoskett~commonswiki assumed (based on copyright claims) – CC-BY-SA-3.0-migrated/ Wiki Commons

The Jaguar XK inline-six engine, introduced in 1949, is often praised for its smoothness and sophistication. This engine powered iconic models like the Jaguar XK120 and E-Type, earning acclaim for its performance and elegance. Mechanics appreciate the XK for its engineering quality, combining power with a refined driving experience that exemplifies the luxury of classic British automobiles.

Even today, the XK engine remains a sought-after choice for restorations and classic car enthusiasts who admire its historical significance and performance capabilities. Its legacy is celebrated in various classic car shows and enthusiast gatherings.

The Mercedes-Benz M100

Image Credit: unknown - CC BY-SA 3.0/Wiki Commons — Image Credit: unknown – CC BY-SA 3.0/Wiki Commons

The Mercedes-Benz M100 engine, introduced in 1963, is notable for its powerful V8 design, originally intended for the prestigious 600 model. Mechanics respect the M100 for its exceptional engineering, providing smooth performance and reliability in luxury vehicles. This engine’s design has influenced many subsequent Mercedes models, showcasing its lasting impact on the brand’s reputation for excellence.

Its legacy is preserved in the classic car community, where enthusiasts work to restore and maintain vehicles powered by this remarkable engine. The M100 continues to represent the pinnacle of engineering from Mercedes-Benz, embodying luxury and performance.

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Adrian Estremos

Adrian Estremos is a staff writer and digital content specialist at Fast Lane Only, supporting the site’s automotive publishing workflow, content formatting, SEO refinement, and editorial presentation standards. He contributes to article editing, image sourcing, publishing coordination, and content optimization designed to improve readability and audience engagement across the platform.