Motor and Power: Cadence vs Torque Sensor<\/h2>\n
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Both bikes run 250W motors<\/strong> and are limited to 25 km\/h<\/strong> under EU pedelec regulations<\/a>. The difference is how they deliver that power.<\/p>\n The A1F Pro uses a cadence sensor: it detects that you’re pedaling and kicks in the motor. There’s a slight delay between starting to pedal and feeling the boost. After a few rides, you stop noticing.<\/p>\n The Brompton uses a torque sensor: it reads how hard you’re pushing the pedals and adjusts power proportionally. The result feels smoother, more like a natural tailwind than a motor kicking in. According to Electric Bike Review’s sensor comparison guide<\/a>, torque sensors are generally preferred by experienced cyclists, while cadence sensors work perfectly well for casual commuters.<\/p>\n My honest take after four weeks: the difference matters most on the first ride. By week two, I stopped thinking about it on either bike. If you’re cycling for the joy of cycling, the Brompton’s torque sensor is noticeably better. If you’re cycling to get to work, the A1F Pro is fine.<\/p>\n Winner:<\/strong> Brompton (but the gap is smaller than you’d expect for \u20ac1,841 more)<\/p>\n Here’s something surprising: the A1F Pro has a bigger battery<\/strong> (36V 7.5Ah, 270Wh) than the Brompton (36V 2.9Ah, 104Wh), yet the Brompton claims longer range (50 km vs 40 km). That’s because the Brompton weighs 9.4 kg less, and its mid-drive motor is more efficient on flat terrain.<\/p>\n My real-world testing results:<\/p>\n That 10 km advantage matters if you push the limits of your range. For most European city commutes under 15 km each way (30 km round trip), both bikes have more than enough. The A1F Pro’s battery is also removable, which means you can charge it at your desk or at home without moving the bike. The Brompton’s battery is removable too, and it’s smaller, so it fits in a bag.<\/p>\n One note on cold weather: lithium-ion batteries lose 10\u201320% capacity below 5\u00b0C. If you commute in Copenhagen or Stockholm during winter, factor that into your range calculation. Battery University explains the temperature effect<\/a> in detail.<\/p>\n Winner:<\/strong> Brompton (marginal, and only relevant for longer rides)<\/p>\n This is where the price gap starts to make sense. The A1F Pro weighs 21 kg<\/strong>. The Brompton weighs 11.6 kg<\/strong>. That’s a 9.4 kg difference you feel every time you pick up the bike.<\/p>\n I carried both on Munich’s S-Bahn for two weeks. The Brompton felt effortless. I tucked it beside my seat and forgot about it. The A1F Pro was manageable but noticeable. Carrying it up the stairs at Marienplatz station reminded me it was there.<\/p>\n Practical weight comparison:<\/p>\n If your daily routine involves carrying the bike up stairs or onto trains, the Brompton’s weight advantage is worth serious consideration. If you mostly ride door-to-door with minimal carrying, the A1F Pro’s extra weight is a non-issue.<\/p>\n Winner:<\/strong> Brompton (decisively)<\/p>\n \u2728BUY DYU A1F PRO<\/span><\/a><\/p>\n This is the plot twist. The DYU A1F Pro<\/strong> comes with a front basket and rear rack as standard. The Brompton Electric does not. You can add Brompton’s front bag and rear rack as accessories, but that adds \u20ac150\u2013\u20ac300 to an already expensive bike.<\/p>\n I tested the A1F Pro for weekly grocery runs:<\/p>\n For daily errand runners, this is a genuine advantage. The Brompton is a pure commuter; the A1F Pro is a commuter that also does your shopping.<\/p>\n Winner:<\/strong> A1F Pro (decisively)<\/p>\n Let’s break down where the Brompton’s extra money goes:<\/p>\nBattery and Range<\/h2>\n
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Weight and Portability<\/h2>\n
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Cargo Capacity: The A1F Pro’s Secret Weapon<\/h2>\n
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Pros and Cons<\/h2>\n
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\n \n<\/th>\n DYU A1F Pro<\/th>\n Brompton Electric<\/th>\n<\/tr>\n<\/thead>\n \n Pros<\/strong><\/td>\n \u2022 \u20ac459 price point
\u2022 Front basket + rear rack included
\u2022 Removable 270Wh battery
\u2022 Disc brakes front and rear
\u2022 120 kg load capacity<\/td>\n\u2022 11.6 kg (ultra-light)
\u2022 Torque sensor (natural ride feel)
\u2022 Smallest fold on the market
\u2022 Premium build quality
\u2022 50 km range<\/td>\n<\/tr>\n\n Cons<\/strong><\/td>\n \u2022 21 kg (heavy for stairs)
\u2022 Cadence sensor (slight delay)
\u2022 Basic display
\u2022 Larger folded size<\/td>\n\u2022 \u20ac2,300+ price
\u2022 No cargo included
\u2022 Rim brakes (less stopping power)
\u2022 Smaller battery (104Wh)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nCost Analysis: What \u20ac1,841 Buys You<\/h2>\n
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