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How to choose a sat nav

Choosing a sat nav depends on screen size and storage capacity. A generous screen improves map readability while driving, and sufficient storage lets you load multiple regional maps without compromise.

What to check

Screen size The screen diagonal determines your reading comfort while driving. It is measured in inches and affects the legibility of maps, street names and route guidance. Models on the market display diagonals between six point seven five and ten point one inches. The median sits at eight inches, suitable for daily use. A larger screen enhances overview and reduces eye strain on long journeys. The site’s score positions each product between these extremes: the longer the bar, the larger the screen. Check that the size remains compatible with your windscreen and mounting bracket. Market median: 8 "
Storage capacity Internal memory stores road maps, points of interest and updates. It is measured in gigabytes. Devices surveyed offer between sixteen and sixty-four gigabytes, with the median at thirty-two gigabytes. This value allows you to store several European countries without filling the memory. Generous storage avoids frequent deletions and permits adding extended zones. The displayed score places each model within this range: the longer the bar, the more space you have. Some sat navs accept an external memory card to expand this capacity, but internal storage remains key for smooth operation. Market median: 32 GB
Mounting and power supply Check that the mount fixes firmly to the windscreen or dashboard without excessive vibration. Power usually comes from the cigarette lighter socket, with a cable long enough to reach your preferred location. Some models include a battery for occasional pedestrian use. Ensure that suction cups or clips withstand temperature changes and that the cable does not obstruct vehicle controls. Thoughtful positioning preserves your field of vision while keeping the screen within sight.

Benchmarks based on 14 recent market listings, collected on 12 October 2026.

What you get for each budget

Under €100

Under one hundred euros, you find sat navs with a modest screen and limited storage suitable for occasional regional trips.

€100 to €200

Between one hundred and two hundred euros, the screen gains diagonal size and storage reaches median values, enough for several countries and daily use.

Over €200

Over two hundred euros, screens exceed eight inches comfortably and storage offers ample margin to load numerous maps without constraint.

Frequent mistakes

Neglecting screen size and having to squint to make out directions while driving.
Underestimating the storage needed and having to delete maps before every long trip.
Choosing an unsuitable mounting bracket that vibrates or detaches at the slightest pothole.
Forgetting to check the power cable length before final installation.

Models in this category

Best rated first, among those our merchants offer.

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