# Difference Between Two-stroke and Four-stroke Engine [PDF]

Contents

## Introduction

There are two main types of engines, one is four-stroke engine another one is two-stroke engine. Let us first study both of them individually then we will understand the difference between two stroke and four stroke engine.

## Two-Stroke Engine

In a 2-stroke engine the four successive strokes, i.e. Suction, Compression, Power, and Exhaust are completed in 1 revolution of the crankshaft. This means that in the 360-degree rotation of a crankshaft all the successive strokes are completed.

## Four-Stroke Engine

In a 4-stroke engine the same successive strokes (Suction, Compression, Power, and Exhaust) are completed in the 2-revolution of the crankshaft. i.e. 720-degree rotation of the crankshaft.

## FAQ:

### What is a 2-Stroke Engine?

We call an engine a 2-stroke engine when the four successive strokes, i.e. Suction, Compression, Power, and Exhaust are completed in 1 revolution of the crankshaft.

### What is a 4-Stroke Engine?

We call an engine 4-stroke engine when the same successive strokes (Suction, Compression, Power, and Exhaust) are completed in the 2-revolution of the crankshaft.