Choosing the right rooftop tent can completely change how you experience the outdoors. Whether you’re heading out for a weekend with the family, tackling a long-distance overland route, or simply looking for a smarter way to camp – Alu-Cab’s two newest hard-shell tents deliver premium comfort, rapid deployment, and bombproof construction.
The question is: which one is right for you?
The RT-4S 4-Sleeper Hardshell Rooftop Tent and the RT-2S Hardshell Rooftop Tent both carry Alu-Cab’s legendary build quality, but they serve very different adventurers. This guide breaks down every key difference so you can make the right call before you buy.
The short version: the RT-4S is built for maximum space, and the RT-2S is built for maximum versatility.
The RT-4S was designed to bring rooftop camping to families and larger groups. Alu-Cab created it in response to demand for a standalone version of their popular ModCAP Family Camper – a tent that delivers serious sleeping space without the full ModCAP platform. The result is the largest hard-shell rooftop tent (RTT) they’ve ever made, offering over 4.5m² of sleeping space via an innovative flip-out design.
The RT-2S takes the opposite approach. It’s compact, lightweight, and engineered to preserve valuable roof space for additional gear. Bikes, boards, kayaks, recovery equipment, roof boxes – the RT-2S leaves room for the kit that makes your trip possible.
In short: RT-4S = maximum space. RT-2S = maximum flexibility.
The RT-4S comfortably sleeps four adults. Its flip-out sleeping platform expands the interior well beyond what a standard clamshell tent offers, with a sleeping area of 2,235mm x 2,050mm. The extra width and added headroom make this tent genuinely comfortable for families with children, or couples who want space to spare.
Inside, you’ll find:
It functions more like a rooftop basecamp than a traditional tent. If longer stays and genuine comfort up high are the priority, this is where the RT-4S shines.
The RT-2S sleeps two adults on an internal bed platform of 1,364mm x 2,036mm – a generous sleeping surface that doesn’t feel cramped. A 60mm high-density foam mattress, heavy-duty 280gsm blackout canvas, and an insulated automotive-grade shell ensure you sleep well regardless of the conditions outside.
Standard features include:
For couples and solo travellers, the RT-2S delivers exactly what’s needed – and nothing that isn’t.
The RT-4S is a big tent. At 2,400mm long (closed), it requires a vehicle with genuine roof capacity to match. Dual-cab bakkies with canopies, large SUVs, and long-wheelbase overlanding rigs are the natural home for this tent. Alu-Cab recommends three 1,450mm load bars for mounting, and the tent supports up to 200kg static load when closed.
The RT-2S was specifically designed for a wider range of vehicles. Crossover SUVs, station wagons, mid-size 4x4s, and dual-cab pickups with standard roof racks can all accommodate it. Its closed dimensions of 1,471mm (W) x 1,560mm (L) x 369mm (H) keep the profile low and the fitment options broad.
If you’re not sure whether your vehicle can handle the RT-4S, that’s a strong signal to consider the RT-2S first.
Neither tent will have you fumbling around in the dark. Both deploy quickly and intuitively – but there are differences worth knowing.
The RT-4S uses a fold-out sleeping platform where the integrated telescopic ladder doubles as structural support for the extended section. The ladder stows neatly inside when closed and handles up to 150kg when deployed. It’s a smart system, though it involves a few more steps than a basic clamshell.
The RT-2S is faster. Its symmetrical design allows it to open to either side of the vehicle in well under a minute. There’s no fixed front or back orientation – the tent adapts to your setup, not the other way around.
Both tents offer left- or right-hand deployment, which is a practical advantage when you’re parking on uneven terrain or a tight campsite.
Quick Comparison
| Feature | RT-4S | RT-2S |
|---|---|---|
| Sleeps | 4 Adults | 2 Adults |
| Best For | Families & Extended Travel | Couples & Solo Overlanders |
| Footprint | Large | Compact |
| Roof Space Remaining | Limited | Excellent |
| Skylight | Yes | Yes |
| Solar Ready | Yes | Yes |
| USB Charging | Yes | Yes |
| Heater Vent | Yes | Yes |
| Setup Time | Under 1 Minute | Under 1 Minute |
| Comfort Level | Maximum | High |
Both tents represent a serious step forward in hard-shell rooftop tent design – but they’re built for different people.
The RT-4S is the most capable family rooftop tent Alu-Cab has ever built. It offers exceptional space, a well-thought-out interior, and the kind of comfort that makes multi-night camps genuinely enjoyable. If you’re travelling with a group and want to keep everyone comfortable off the ground, this is your tent.
The RT-2S is a smarter solution for the adventurer who wants premium rooftop sleeping without compromising their vehicle’s versatility. It’s lighter, faster to deploy, and leaves room on the roof for everything else your adventure demands.
If space is your priority, go RT-4S. If versatility is your priority, go RT-2S.
Either way, you’re investing in a rooftop tent built to handle whatever African terrain throws at it.
