Looking for a two-person Class B RV that will take you off-grid, but don’t want to forgo any modern conveniences? You’re going to love the luxurious Grech RV Terreno-ion Twin AWD. This mid-sized Class B is designed to get you and your favorite traveling companion well off the beaten path for a carefree and flawless RV camping experience.
Available in AWD, the Grech RV Terreno-ion has two well-considered floorplans: the Tour and the Twin. Both floorplans are built on a fully electric, fully optioned, 170-inch Mercedes-Benz Sprinter chassis. The 22-foot, 8-inch Terreno-ion is roughly two feet shorter than its siblings, the extended Grech RV Strada-ion Lounge and Tour models. This makes it nimble and better suited to go boondocking off-road than its slightly longer sibling. Right in the middle of the Grech RV line, the Terreno-ion Twin is also almost two feet longer than the smallest RV in Grech’s lineup, the Grech RV Turismo-ion.
Two Terreno-Ion Floorplans
There are some key differences between the Terreno-ion’s two floorplans that make each of them appeal to a different RV buyer. To start with, the Tour floorplan has seat belts for up to seven passengers, while the Twin floorplan only has seating for two people. However, the big upside of the Twin floorplan is the extra space for extra large toys — bikes, paddleboards, et cetera — between the twin sofas.
So, if you’re looking for a spacious and luxurious Class B that’s perfect for one or two people, with more space to store your gear, the Grech RV Terreno-ion Twin floorplan could be exactly what you’re looking for.
At a Glance: Terreno-Ion Twin AWD
Check Some Specs
- Overall Height: 9 feet 11 inches
- Overall Width: 6 foot 8 inches
- Overall Length: 22 feet 8 inches
- Interior Height: 73 inches
- Fresh/Gray/Black: 26/27/13 Gallons
- Lithium-Ion Battery Storage: 1260 amp hours
- Solar Panels: 300 Watts
- Bed: 66 inches (wide) by 76 inches (long)
- Seating Capacity: 2
- Sleeping Capacity: 2
Features We Love
- Elegant and uncomplicated exterior
- And built, spacious cabinets
- Firefly touch pad controls everything
- No propane!
- No noisy generator
- Quiet, all-electric power system
- Separate back and front areas
- Drop-down insect screen at back
- Insect screen on one-touch power side door
- One-touch power side door
- Oh-so-comfortable seating and sleeping
- Shade at back that doubles as a movie screen
- Twin couches offer sleeping options
- Pop-up table
- Storage shelves and cubbies
- Outdoor shower
- Captain’s chair position memory
- Rear Lagun table can be deployed as needed
- Rear windows open and have insect screens
- Quiet 1260 Watt hour power system for up to six days off-grid
- Whisper quiet Gree air conditioner/heat pump
- Diesel furnace and hot water
- Spacious wet bath with three mirrors
- Ceramic toilet with macerator that makes emptying tanks a breeze
- 5,000-pound towing capacity (with hidden tow hitch) to bring toys
- Dog friendly features: Outdoor shower and easy-to-clean interior surfaces
- Off road capability can take you anywhere!
Benefits
- Off-road ability
- Elegant and refined appearance
- Many well-crafted, luxurious amenities
- Additional storage space between rear seats for a bike, paddleboard, or fishing rods
- Big fridge with separate freezer
- Massive wardrobe/pantry
- Dog-friendly
- Build quality
Challenges
- The Terreno-ion Twin only seats and sleeps two. It’s a Class B, so you can expect it to sleep two. But if you want more passenger space, the Terreno-ion Tour, Strada-ion Lounge, and Strada-ion Tour models might be nice alternatives.
- Some might not like having a wet bath.
- No outdoor storage. The storage space you get in the Terreno-ion Twin is in the cabin between the seats.
Who Is This For?
- Singles or couples who want more amenities than the standard camper van supplies are right in the Terreno-ion Twin’s wheelhouse.
- The Terreno-ion Twin AWD is perfect for boondocking off the grid, with its robust off-road handling, solar power package, and lithium-ion battery storage,
- Digital nomads or other RVers who like road trips are going to love this.
How RV Trader Does Reviews
At RV Trader, we asked RV shoppers (like you) what was most important to them in their RV buying process. And those shoppers came up with a list of six key areas: sleeping space, bathroom, living area, kitchen, four-season capability, and storage. So, you can expect those categories to be evaluated in every RV Trader review.
RV Trader is committed to an independent RV reviews process and hires experienced RV experts to evaluate each model.
I’m Lynne, and that’s where I came in. I’m an RV expert. When I review RVs, my goal is always to perform each review objectively. And when RV Trader sent me to the Grech RV showroom in Riverside, California, I did exactly that. While there, I carefully examined the Terreno-ion Twin AWD in person. Here’s what I saw.
Sleeping Space
In the rear of this RV, you’ll find two comfy ultraleather sofas that face one another along with an entertainment center that includes an LED smart TV and a premium soundbar. When it’s time for bed, I loved that I could simply use either the wall mounted Firefly touchscreen controller or the phone app to recline both sofas into a comfortable 66-inch by 76-inch bed.
With that being said, each sofa is in itself a comfortable sleeping space, so two travelers can sleep separately too.
Before you go to bed, you’ll want to go to the Firefly panel (or the Firefly App on your phone) and choose Shades. From there, you can either choose the Master option to lower all the shades, or just choose the shades you want to lower with individual options.
A Little Fresh Air
I always like sleeping with the windows open so I was delighted to find that Grech RV campers have a power screen that drops down to fully protect the interior from bugs. I could easily imagine waking up in the morning, rear doors wide open, enjoying a stunning view in one of the many beautiful places across the US. Nice touch, Grech.
Other cool features you’ll find in the sleeping area include the handy 110V power outlets and USB charging outlets complete with built in shelves. This feature lets you charge your electronics while you sleep (or whenever).
Bathroom
The Twin floorplan has a spacious wet bath that’s packed with features. Like everything Grech RV does in the RVs I looked at, the bathroom was seamlessly elegant. There’s plenty of good light for shaving or makeup, for those that are so inclined. Walls are glossy and easy to keep clean, without any seams to maintain. In addition, there were a lot of little details here that added up to a well-appointed bathroom that felt far from cramped.
One of these details is the window in the bathroom that’s ingeniously concealed from the outside. However, there’s still a pull-down shade for additional privacy. (It’s always nice to have options.) There are also three mirrors that help the bathroom in the Terreno-ion Twin feel spacious and airy. One of these is mounted on the door so it can be used outside the bathroom when the door is open.
I loved that there’s a ceramic toilet with a macerator in the bathroom. Ceramic toilets are a breeze to clean compared to their plastic counterparts. Having a macerator helps to keep black tank odors at bay and minimizes black-tank-related chores.
Other cool features in the bathroom of the Terreno-ion Twin are:
- Excellent lighting for shaving or makeup
- Generous vanity mirror
- Pullout, multi-position shaving/makeup mirror
- Faucet that transforms into a shower head
- Hooks for hanging towels and washcloths
- Concealed window with a window shade for privacy
- Ceramic toilet with macerator
- Cloth shower curtain
- Large mirror on door
- Protected toilet tissue holder to keep toilet tissue dry
Living Area
Aside from the lounge area at the rear of the RV with its own Lagun style table, the Terreno-ion Twin’s fully adjustable front seats swivel to face the living area. This gives you additional seating options. I loved that the captain’s chair closest to the one-touch power door can be positioned to make use of a little table that pops out from the end of the kitchen cabinets. This could give you an extra work surface, or it could be used to extend the kitchen countertops.
No potentially useful space is wasted in the Terreno-ion Twin floorplan. With that being said, the driver’s seat also swivels to face a smaller flip up table that can extend from the wall behind it. So two remote workers could work side-by-side and work on projects together.
I really liked the versatility of the Twin. It’s laid out so people could be relaxing in the rear lounge area while others are doing work related tasks at the front. And all this can be done with the power side door open because it has its own screen door to protect against insects.
Extending the Space Outside
Outside, there’s a generous awning (with a wind sensor) that adds sheltered outdoor living area to the Terreno-ion Twin. The Firefly App (or touch pad) lets you control both the awning and its adjustable lighting. I loved the design-conscious way that Grech RV adds its power awning to the side of all Grech RVs. Instead of just plunking it next to the roof of the RV and screwing it on, Grech RV maintains the visual integrity of their RV’s elegant exterior appearance. The result is an artistically aerodynamic design that reveals keen attention to detail.
In addition, the power shade that drops from the top of the rear doorway is white on the outside. This happens to make it a perfect movie screen. All you’d need to add is a starry night, a projector and popcorn for a perfect movie night under the stars.
Kitchen
The galley-style kitchen area of the Terreno-ion Twin has enough cool features to keep almost any camp chef happy. After all, this functional kitchen boasts gorgeous quartz countertops, a surprising amount of storage space, a farmhouse sink with a pull-down faucet, and versatile appliances that make the most of limited space. For appliances, The Terreno-ion Twin offers an induction range, a combination convection oven/air-fryer/microwave, and a generous fridge with a roomy freezer on the bottom.
As with any Class B RV kitchen, counter space is limited here. But not to worry: Grech RV gets around this inherent issue with an integrated induction cooktop and a removable countertop cover that fits over the sink to increase usable counter surface. As previously mentioned, there’s also a flip-up table/work surface mentioned earlier that could be used as a kitchen area too. All of this makes for a surprisingly practical and functional galley style kitchen in this 22-foot, 8-inch RV.
Storage and Stuff
Kitchen storage is contained in many solid hardwood cabinets and drawers. I really loved that all the Grech RVs have locking cabinets so dry goods and dishes stay in place. This is perhaps especially handy when you go off road to more remote campsites. Here’s a list of other features I loved about the kitchen in the Terreno-ion Twin.
- Flip-up work surface/table
- Quartz countertops
- Two-burner induction stove
- Combination microwave/convection/airfryer
- Big,“farmhouse style sink
- Faucet with pull-out sprayer
- Large 12V refrigerator with a separate freezer
- Plenty of storage in hardwood cabinets and drawers
- A handy flip-out storage caddy under the sink for a pot scrubber or other dishwashing tools
Four-Season Capability
Grech RV puts multiple layers of insulation into all of its RV floors, walls, and ceilings. Freshwater and gray water tanks are insulated and heated too. The Gree air conditioner doubles as a delightfully quiet heat pump. However, in really cold weather, there’s an efficient Timberline heater that operates on diesel. It’s nice to have both options and nicer still to not have to worry about filling and lugging propane bottles. There’s enough in the Grech RVs to keep you comfy and cozy for at least most of the year.
However, Grech RV spokesperson John Black was quick to point out that these RVs are not designed for use in extreme cold (e.g., a typical Canadian winter). With that said, these RVs are designed for comfortable camping for four seasons where winter temperatures are relatively mild and three seasons where winter temperatures drop well below freezing.
Storage Space
One of the challenges of most Class B RVs is where to put stuff so it stays organized enough that we can find it. Both floorplans of the Terreno-ion have impressive storage capacity in many spacious and beautifully handcrafted birch hardwood cabinets. However, the twin bed floorplan also has the advantage of having a perfect storage space for fishing gear, a paddleboard, or a bicycle in the space between the two sofas at the back of the RV.
The Terreno-ion Twin beds include a massive wardrobe cabinet near the front of the RV. It’s big enough to hold items like jackets and/or camping chairs. However If you need more space to store food, the wardrobe cabinet could easily lend itself to pantry storage with the addition of shelves. We were also delighted to find lots of shelves throughout the Terreno-ion Twin that could be used to stash books, laptops, or electronic devices.
Side Note on the Cabinets
Cabinets in Grech RVs are beautifully hand-crafted from high grade birch plywood available in either a light or dark stain. It’s a relief that there is no MDF (otherwise known as particle board) in Grech RVs. MDF has a tendency to swell and disintegrate over time in any RV. It’s a real annoyance that shortens the useful life of many RVs. Compared to MDF, plywood is impervious to moisture and offers structural integrity to cabinets.
Buyers Should Also Know
Exterior Niceties
As previously noted, Grech RVs have a refined and understated elegance. From the outside, they look very much like an ordinary Mercedes-Benz Sprinter Van. Appliances and extrusions on the roof of these RVs are painted to match the exterior color. So unless you have a discerning eye, it’s hard to tell you’re looking at an RV. It makes them an especially natural fit for RVers that live in HOA communities.
Another cool feature is that there isn’t a single utility access hole cut into the side walls of Grech RVs. Instead, all of the utility access points are concealed beneath a protective strip of stainless steel along the bottom quarter of the RV. Again, it’s in keeping with the RV’s elegant appearance. However, there is more to this than good looks. It’s this: No intrusion points means fewer places water can get in. It also means you don’t need to protect your RV from water damage with yearly resealing.
It’s a Pleasure to Drive
While I didn’t get to test drive this particular floorplan, my test drives of two other Grech RVs reconfirmed my love for the Mercedes-Benz Sprinter chassis. The 4-cylinder, 9-speed diesel chassis is fun to drive. To start with, Its raised driving position and expansive windshield offer an impressive view of the road. The fully optioned chassis gives you fully adjustable heated and cooled driver and front passenger seats. Each of them can be programmed to remember the precise seat position of up to three drivers. The seats themselves feature comforts like memory foam, heating, cooling, and lumbar support.
All of the driver’s controls are easy to find and well within reach. This includes Mercedes’ easy to operate touch screen with on board navigation. Apart from that, this vehicle handled beautifully. It was remarkably responsive and felt quick and had plenty of power, even on steep grades.
Favorite Driving Features
- Fantastic visibility of the road from the driver’s position
- Easy to operate navigation system
- Great stereo
- Backup camera
- Rain sensors
- Parking sensors
- Super comfortable captain’s chair with fully customizable seat and back positions with preset controls for multiple drivers
- Sublimely comfortable captain’s seat
Impressions About Grech RV
Grech RV is a relative newcomer to the RV industry. However, this family-owned company has been making sought after luxury limousines and buses for more than 40 years. So Grech RV had time to develop its luxury vehicle game long before jumping into the RV market in 2021.
Right from the start, Grech RV did away with most of the pain-points that RVers often have with Class B RVs. Further, the attention to detail in Grech RVs is phenomenal. Every contour, every feature and every amenity has been meticulously thought out and exquisitely crafted.
Grech RV raised the bar for the RV industry within a few short years of its entry into the RV industry with its quick response to customer concerns and outstanding commitment to both quality and customer service — a huge and often overlooked differentiator in the industry.
The Customer Service Difference
If a customer has an issue with their RV, they are advised to give Grech RV — not their dealer — the first call. (They even give you a personal number.) Giving Grech RV the first call helps owners to diagnose over 90 percent of problems. Which reduces wasted time, money, and energy over maintenance. If maintenance is required, Grech RV helps arrange for an approved technician to fix it right away. Frankly, it’s a commitment to service we’d love to see the entire RV industry match.
Make Your Move
Start shopping for the year, make, and model. Find Your Terreno
You Might Also Like
2025 Grech RV Strada-Ion Lounge Review
2025 Grech RV Strada-Ion Tour Review
2024 Grech RV Turismo-Ion Tour AWD Review
2024 Grech RV Turismo-Ion Twin AWD Review
2025 Grech RV Lusso Review
What Other Campers Are Saying
Read the best reviews by owners. Search for an RV Model
