Скачать или смотреть KNAUS SUN I 900 LX Explained: 3-Axle A-Class at 882cm | Specs + Competitor Comparison

The KNAUS SUN I 900 LX is a long A-Class tag-axle motorhome built around a familiar flagship formula: a big front lounge, a drop-down bed, and a rear island bed over a garage. On paper it looks like the “everything” option for touring. In practice, this model is a good example of how a large layout can become option-dependent, weight-sensitive, and less coherent than key rivals once you start looking at real touring use.

In this video I go through the SUN I 900 LX critically: where the size helps, where it creates avoidable compromises, and why several competitors—Hymer MasterLine, Carthago chic c-line i, Niesmann+Bischoff Arto, Dethleffs Globetrotter XL I, Frankia Platin, and even entry-lux alternatives—often deliver a more convincing “premium A-class” package once you factor in payload, winterisation strategy, storage logic, and how much you must add via options to make the vehicle tour-ready.

Specs
Axles: 3
Length: 882 cm
Width: 234 cm
Height: 294 cm

Where the SUN I 900 LX loses to rivals
1) Payload risk is the real story

This is where the SUN I 900 LX often falls behind the best competitors. In this class, buyers typically add kit which can consume payload quickly. The result is a flagship motorhome that looks designed for touring but is overweight.

Why competitors look better here

Several rivals are engineered around higher real-world carrying tolerance and more coherent “ready-to-tour” spec strategies.

Why competitors look better here

Carthago and Niesmann+Bischoff tend to focus harder on storage geometry and systems placement so the motorhome feels more integrated rather than simply enlarged.

3) Option-dependence: “flagship” that needs too much adding

At this price and size, buyers expect a touring spec. The SUN I 900 LX can land in an uncomfortable middle ground where you still have to add equipment.

Hymer MasterLine and upper Carthago trims often feel more “finished” in the way systems, insulation and equipment are packaged.

4) Driving reality: length and width are not theoretical

At 882 cm long and 234 cm wide, you notice the vehicle—on smaller sites, in fuel stations, in village routing, and when you want to park without pre-planning. Some competitors in the premium segment achieve a similar living experience in a slightly shorter or narrower footprint, which can be the difference between “touring” and “managing.”

If you tour across mixed road networks, the best competitors tend to feel less fatiguing and more consistently usable.

5) The “liner-adjacent” trap

The SUN I 900 LX is large enough to tempt buyers who actually want liner-class solidity—yet it’s still in a segment where you can end up with liner-class expectations but without liner-class engineering tolerance. If you truly want that level, a step-up brand can make more sense; if you do not, then a more coherent premium A-class rival can be the smarter choice.

Competitor comparison
Hymer B-Class MasterLine

Beats Knaus on: chassis refinement feel, integrated engineering coherence, “finished” premium execution

Carthago chic c-line i

Beats Knaus on: storage logic, double-floor style touring practicality, long-term touring design discipline

Niesmann+Bischoff Arto

Beats Knaus on: body/chassis integration philosophy, premium build coherence

Dethleffs Globetrotter XL I

Beats Knaus on: winter-touring orientation and practical robustness in many builds

Frankia Platin

Beats Knaus on: touring systems focus and technical posture
Why it matters: better match if you want capability rather than a showroom flagship

Concorde class step-up

Beats Knaus on: chassis capacity, systems scale, true liner build philosophy
Why it matters: if you’re already thinking like a full-timer, the SUN I may be the wrong rung

Who should still consider the SUN I 900 LX

Buyers who specifically want 882 cm + tag axle + island bed + garage and accept that real-world touring spec may require careful option discipline and weight management.

Who should not

Anyone prioritising payload headroom, winter touring coherence, or a “finished premium system” feel without relying on option packs and dealer installs.


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