Miyota 8215 Vs 8315 Watch Movements: Which Is Better?

If you’re in the market for a new watch, you may be wondering about the differences between the Miyota 8215 and 8315 movements. Both are popular Japanese quartz movements known for their affordability and reliability. But which one is right for you?

In this comprehensive guide, we’ll compare the Miyota 8215 and 8315 head-to-head. We’ll look at specifications like size, accuracy, features, price, and more. By the end, you’ll understand the key differences between these two watch movements so you can choose the best option for your needs.

Size and Thickness

The Miyota 8215 is 3.9mm thick while the 8315 is 3.7mm thick, making the 8315 slightly thinner.

When comparing the size and thickness of the Miyota 8215 and the 8315 watch movements, it is important to note that both are relatively compact movements. However, there is a slight difference in thickness between the two. The Miyota 8215 measures 3.9mm thick, while the 8315 comes in at 3.7mm.

Although the difference may seem minimal, every millimeter counts when it comes to watch movements.

The slightly thinner profile of the Miyota 8315 may be advantageous for those looking for a sleeker and more streamlined watch. The reduced thickness can make a noticeable difference in the overall appearance and comfort of the timepiece.

The slimmer profile of the 8315 allows for a more elegant and sophisticated design, making it particularly suitable for dress watches.

Overall, the 8315 has a slimmer profile more suitable for dress watches.

While the difference in thickness between the Miyota 8215 and 8315 may not be significant, it can still play a role in the overall aesthetic and wearability of a watch. The slimmer profile of the 8315 allows for a more refined and sophisticated look, making it a preferred choice for dress watches.

Dress watches are typically designed to be sleek and elegant, and the thinner movement of the 8315 contributes to achieving this desired aesthetic.

It is worth noting that the choice between the Miyota 8215 and 8315 ultimately depends on personal preference and the specific requirements of the watch being built. Both movements offer reliable performance and are widely used in the watch industry.

However, if you are looking for a movement that lends itself well to dress watches and a more slender design, the Miyota 8315 may be the better choice.


When it comes to accuracy, both the Miyota 8215 and 8315 watch movements offer impressive performance. These movements are known for their reliability and precision, making them popular choices for watch enthusiasts.

Both movements offer accuracy around +/- 20 seconds per month.

Both the Miyota 8215 and 8315 movements are designed to provide accuracy within a range of around +/- 20 seconds per month. This level of precision ensures that your watch keeps accurate time, allowing you to rely on it for daily use or special occasions.

With such accuracy, you can confidently wear your watch without worrying about it deviating significantly from the correct time. Whether you need to be punctual for a business meeting or simply want to stay on schedule throughout the day, these movements have got you covered.

The 8215 tends to gain time while the 8315 loses time, but accuracy is comparable.

While both movements offer similar levels of accuracy, there are slight differences in their timekeeping tendencies. The Miyota 8215 movement is known to have a tendency to gain a few seconds over time.

This means that your watch may run slightly ahead of the actual time, but the overall accuracy remains within the acceptable range.

On the other hand, the Miyota 8315 movement has a tendency to lose a few seconds over time. This means that your watch may run slightly behind the actual time, but once again, the overall accuracy remains within the acceptable range.

It’s important to note that these tendencies may vary from watch to watch, as other factors such as the watch case, dial, and hands can also influence the accuracy. However, in terms of overall precision, both movements perform admirably and offer a high level of accuracy that meets the demands of most watch wearers.

If you want to delve deeper into the technical specifications and performance of these movements, you can visit reputable watch forums or watch manufacturer websites for more in-depth information.

Complications and Features

The 8215 offers time and date functions.

The Miyota 8215 watch movement is known for its reliable and accurate timekeeping capabilities. It features the basic time and date functions, making it a popular choice for many watch enthusiasts. With a frequency of 21,600 beats per hour (BPH), the 8215 movement ensures precise timekeeping, giving you the confidence that your watch will always display the correct time.

In addition to its timekeeping capabilities, the Miyota 8215 movement also includes a date function. This means that your watch will not only tell you the time accurately but also keep track of the current date.

Whether you’re heading to an important meeting or planning a special occasion, having the date feature on your watch can be incredibly useful.

With its reliable performance and essential time and date functions, the Miyota 8215 movement offers a great balance of functionality and affordability. Many watch brands choose to use this movement in their timepieces due to its reliability and cost-effectiveness.

The 8315 adds a day display as a third complication.

If you’re looking for a watch movement that offers additional functionality, the Miyota 8315 might be the perfect choice for you. Building upon the features of the 8215 movement, the 8315 movement includes a day display as a third complication.

With the day display feature, your watch will not only show you the time and date but also the day of the week. This can be particularly useful for those who rely on their watches for scheduling and planning purposes.

Whether you’re keeping track of important appointments or simply want to stay organized, having the day display complication on your watch can be a game-changer.

It’s important to note that while the 8315 movement offers this additional complication, it still maintains the same reliable timekeeping capabilities as the 8215 movement. So, you can enjoy the benefits of accurate timekeeping along with the added convenience of the day display.

Ultimately, whether you choose the Miyota 8215 or the 8315 will depend on your personal preferences and the specific features you value in a watch movement. Both movements offer reliable performance, with the 8315 having the added advantage of the day display complication.

Take your time to consider your needs and desired features before making a decision.

Power Reserve

The 8215 has an approximately 42 hour power reserve when fully wound.

One of the key features of the Miyota 8215 watch movement is its impressive power reserve. When fully wound, this movement can keep the watch running for approximately 42 hours. This means that even if you don’t wear your watch for a day or two, it will still keep accurate time.

The extended power reserve of the 8215 is great for those who like to rotate their watches or have a collection of timepieces.

The 8315 has a slightly shorter 40 hour power reserve.

On the other hand, the Miyota 8315 watch movement offers a slightly shorter power reserve of about 40 hours. While it may not match the 42-hour power reserve of the 8215, it is still a respectable duration that ensures reliable timekeeping for several days.

This is more than enough for most individuals who wear their watches regularly.

When comparing the power reserve of these two Miyota movements, it is important to note that the difference of two hours may not be significant for many watch enthusiasts. Both movements provide ample power reserve to keep the watch ticking without the need for frequent winding.

It is worth mentioning that the power reserve of a watch can vary depending on several factors, including the condition of the movement, the quality of the mainspring, and the efficiency of the winding mechanism.

Regular servicing and proper maintenance can help optimize the power reserve of any watch movement.


The Miyota 8215 tends to be priced around $20-30 USD.

One of the main advantages of the Miyota 8215 watch movement is its affordability. With a price range of around $20-30 USD, it offers great value for watch enthusiasts on a budget. Despite its lower price point, the Miyota 8215 still delivers reliable performance and accuracy, making it a popular choice among entry-level watch brands.

The 8315 costs $10-15 more in the $30-45 USD range.

If you’re willing to spend a bit more, the Miyota 8315 is a step up from the 8215 in terms of price. Typically priced in the range of $30-45 USD, the 8315 offers some additional features and improvements over its counterpart.

This slight increase in price can be attributed to the enhanced functionality and enhanced performance that the 8315 provides.

It’s important to note that the price range mentioned here is based on general market trends and may vary depending on the brand and retailer. It’s always a good idea to check with authorized dealers or trusted online sources to get the most accurate pricing information for the Miyota 8215 and 8315 watch movements.


In summary, the Miyota 8315 is the slimmer, more feature-packed movement best suited to dress watches. It offers day and date complications plus excellent thinness. The 8215 is more affordable but lacks the day display and slim profile.

Consider your priorities – if a super slim watch is important, go for the 8315. But if budget is a bigger concern, the 8215 delivers solid performance for less. Either way, both are great Japanese movements that will serve you well.

Sharing is caring!

Similar Posts