Ambrogio Twenty Elite · Stihl iMow 6 EVO

Compact enough for narrow side yards, but Ambrogio’s own US dealer warns dense or spongy turf can lift the deck and trigger boundary errors.

The Elite trim’s 4G connectivity flags a lost GPS signal, yet recovery is a service center visit, not a self-clearing fix, per an r/automower thread on this model.

Boundary-triggered randomness, not intelligent mowing: a roboter-forum trade technician deflates the marketing claim directly.

Three EVO generations in, STIHL still buries the boundary wire; anyone hoping the EVO name meant a move to wire-free navigation will not find it here.

The extra size and a slope rating up to 55 percent with the kit cost more than the 5 EVO, and dealer-set pricing makes the actual number hard to pin down before a quote.

German testers found a clean mulching cut, but also a documented failure mode: the machine can be stranded on the smallest edges of steep ground.

Wire-free or RTK-only installations

Perimeter wire is non-negotiable for this model. Retrofitting existing wireless infrastructure requires complete hardware replacement.

Sloped terrain above 45%

Ambrogio rates the Twenty Elite for a maximum permissible slope of 24 degrees, a 45 percent gradient. Above that the machine is outside its rating. Traction falls off on wet grass well below the limit, so grip on a steep bank is lowest after rain.

Owners seeking minimal seasonal setup

Annual wire inspection, repair, and replacement are baseline maintenance. Dormant-season storage preparation extends effort beyond blade changes.

Anyone trying to avoid wire installation

Three EVO generations in, the boundary is still a buried wire with the install labor and repair risk that implies; no wire-free option exists in this line.

Lawns under a quarter acre

A rated ceiling of about 0.74 acres is well beyond what a small lawn needs; the 4 or 5 EVO covers that area at a lower price point.

Steep edges and corners at the lawn boundary

German testers document the machine getting stranded specifically at small edges, where its weight becomes an obstacle it cannot clear on its own without a manual reset.

Buyers wanting a transparent, published price

Pricing is dealer-set rather than list, which makes the real cost hard to compare against other autonomous mowers before requesting a dealer quote in person.

Not recorded for this robot.