Garmin Edge 1040 vs 840: Which Is Best (For You)? - Swiss Cycles

I can compare the brand spanking new Garmin Edge 840 and the somewhat less spanky

Garmin Edge 540 & 840 Comparison - Performance Bicycle

Garmin Edge 840 Cycling GPS In-Depth Review

Garmin Edge 1040 vs 840: Which Is Better (For You)? - Sportive Cyclist

Garmin Edge 1040 vs 840: Which Is Best (For You)? - Swiss Cycles

Garmin Edge 840 Cycling GPS In-Depth Review

Garmin 540 and 840 and why you would upgrade? – CCACHE

Garmin Edge 1040 vs 840: Which Is Best (For You)? - Swiss Cycles

Garmin Edge 1040 Ultimate Smart GPS Bike Computer, Large Screen, Long Battery Life

do NOT upgrade - Garmin Edge 1040 Review

Garmin Edge® 530 Bike Computer with Performance Insights