Motorized L4 Engine

Build Your Own Inline-4 Engine

Experience efficient automotive engineering, one brick at a time. This LEGO-compatible inline-4 engine captures the simplicity and balance of one of the most common engine designs ever built. Inspired by real-world four-cylinder engines, it’s a rewarding project for builders who appreciate efficiency, reliability, and clean mechanical layouts.

See the Inline-4 Engine Come to Life

Watch all four pistons move in perfect sequence as the crankshaft spins smoothly. The synchronized motion highlights how inline-4 engines deliver dependable performance with minimal complexity. A must-build for car enthusiasts and anyone curious about the fundamentals of engine operation.