Model Engine Kits, Working Engine Models & DIY Mechanical Kits

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WORKING ENGINE MODELS · METAL DIY KITS
Build a real engine. Watch it run.

Shop working V8, Stirling, steam and turbofan model kits—precision metal builds for makers, collectors and engineering enthusiasts.

Working mechanisms Precision metal construction Worldwide tracked delivery

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V8 & MULTI-CYLINDER
Internal Combustion Engine Models
BUILD YOUR OWN
Metal Engine Model Kits
TWIN-CYLINDER
Motorcycle Engine Models
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Magnetic Levitation Cube Ambient Desk Display is a plug-in acrylic desk display that suspends and illuminates a cube-shaped element above a mirror-fin..
-51%
$127.39 $261.15
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Stock: In Stock
Miniature Liquid-Gas Turbofan Demonstration Engine is a finished metal turbine demonstration model with visible compressor and turbine stages, two sup..
-51%
$542.91 $1,112.97
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CAPO W460 1:8 Alloy RC Crawler Model Kit is a premium 1:8 alloy scale-crawler assembly platform with a two-speed transmission, three differential lock..
-51%
$2,351.99 $4,821.58
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Stock: In Stock
Transparent Inline-Six Motorized Engine Model Kit is a motor-driven transparent inline-six assembly model that synchronizes pistons, crankshaft, timin..
-51%
$127.39 $261.15
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Stock: In Stock
SG202-PRO 1:20 Full-Proportional RC Crawler is a compact 1:20 full-proportional off-road truck with independent suspension, metal drivetrain parts and..
-51%
$84.27 $172.75
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Models & Kits
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Built for people who want to know how machines work

Engineering detail, presented with collector-grade clarity.

Every collection is organized by mechanism and operating method, so you can compare assembly complexity, material, scale, power source and display purpose without guessing. EnginesDIY is designed to help builders choose confidently—not simply browse more products.

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7Purpose-built engine collections with clear navigation
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Compare visible mechanisms, assembly formats and operating styles—from compact Stirling demonstrations to multi-cylinder combustion and aviation-inspired builds.

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What are people saying about us

Arrived early, packaged perfectly, beautiful model and a very well received gift for my car enthusiast OH he is over the moon with it
This is the 8th model I have built from this company, and once again I'm completely satisfied. It is beautiful and the workmanship is wonderful, I highly recommend it.
Have build many of these, and for a plastic model, this is one of the best. All parts were included and assembled model runs perfectly. For the price, can't be beat.
Very well made and detailed. Instructions were a little to non understandable but made out. Surprised all the parts where there, only the switch hold down but was missing
I was looking for something challenging and I didn't want to be able to finish it in a day or two. This was perfect. I worked on it a little here and a little there and it took a few weeks to finish and that was exactly what I wanted this to be.
High quality, great instructions and fun to build. It took me a little onger than spec'd but i would not have minded it being even longer. This is my first model. I hope there are comparable projects like this.
Love the V8. I ran in a small issue and contacted consumer services. Very responsive and I am completely satisfied. Looking forward to my next purchase.
Bought as a gift for an older gentleman and he loved it..all metal pieces and so easy to put together..the instruction manual was easy to read. Just wish there was more like this.
Very much fun to build. All metal parts fit precise and the manual has for each building step easy to understand drawings and descriptions. The model engine looks great and also works well.
It was a present for my brother who graduated in mechanical engineering! He simple loved! It was perfect!
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Updated August 7, 2026. A Stirling engine can look deceptively simple: heat one end, cool the other, turn the flywheel and watch it run. Inside, howev..
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Updated August 6, 2026. A turbojet and a turbofan share the same gas-turbine core idea: compress air, add heat in a combustor, expand the gas through ..
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Updated August 5, 2026. A hit-and-miss engine can look almost idle and then suddenly fire. That is not random behavior. It is the visible result of a ..
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Reviewed August 4, 2026. This guide explains the mechanism, not a universal maintenance procedure. Always follow the manual supplied with the exact mo..
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A five-cylinder radial layout makes the odd-cylinder firing-order pattern visible: the sequence advances around the row by every other cylinder. Quick..
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Quick answer There is no single safe break-in schedule for every miniature four-stroke engine. The correct fuel or oil ratio, propeller or load, needl..
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Updated August 1, 2026. This symptom-first guide explains how to verify miniature four-stroke valve timing and lash without guessing at model-specifi..
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Updated July 29, 2026. Use this evidence-based H-F-L-P sequence—Heat, Friction, Leakage and Phase—to diagnose a Stirling engine model that will not..