Terreno vs. Vacanza 22: Grech’s Two 22-Foot Sprinters Compared

The 2027 Grech RV Terreno-ion AWD and Vacanza-ion 22 AWD start from an unusually similar foundation. Both measure 274 inches long, ride on the Mercedes-Benz Sprinter 3500XD 170-inch non-extended High Roof platform, and pair a high-output four-cylinder diesel engine with all-wheel drive. Yet their starting MSRPs sit exactly $30,000 apart: $290,400 for the Terreno-ion AWD and $260,400 for the Vacanza-ion 22 AWD.

That makes this less a question of size and more a question of equipment. The Vacanza 22 preserves much of the Terreno’s underlying platform at the lower starting MSRP, while the Terreno uses its $30,000 premium for additional electrical capacity and standard equipment.

Terreno vs. Vacanza 22: Key Specifications

Those are manufacturer-stated maximums, not guaranteed real-world runtimes; outside temperature, thermostat setting, other electrical loads, battery state of charge, and charging input can all affect how long the A/C runs.

What Do the Terreno and Vacanza 22 Have in Common?

Choosing the Vacanza 22 does not mean giving up interior or exterior size. The two models share the same overall dimensions, while each Tour configuration sleeps up to two people on a 66-by-76-inch memory foam power sofa bed.

The similarities continue underneath the coach. Both use the Mercedes-Benz Sprinter 3500XD 170-inch non-extended High Roof platform with AWD, the same high-output diesel engine, and the same nine-speed transmission. Mercedes-Benz equipment listed for both includes the 10.25-inch MBUX multimedia system, Active Distance Assist DISTRONIC, Active Brake Assist, Blind Spot Assist, heated and swiveling front seats, Parking Assist, and an electric sliding door.

The interior also overlaps substantially. Both include hardwood cabinetry, a solid-surface countertop, a farmhouse-style sink, a refrigerator/freezer, a combination microwave/convection/air fryer, an enclosed wet bath, Timberline diesel-fired hot water and heating, and a 15,000-BTU Gree Eco-Cool A/C with heat pump.

POWER MAX vs. POWER CORE: Where the Biggest Difference Begins

The Terreno uses GRECH POWER MAX™, with 20,480 Wh of 51V lithium-ion battery capacity. The Vacanza 22 uses GRECH POWER CORE™, which provides 10,240 Wh. Grech states that POWER MAX can run the rooftop A/C for up to approximately 16 hours on battery power, while POWER CORE is rated for up to approximately eight hours under the manufacturer’s stated conditions.

Twice the capacity does not mean the Terreno uses an entirely different electrical philosophy. POWER MAX and POWER CORE share the 51V platform, Garmin SERV+ house controls, Grech Connect remote monitoring, an ARCO Zeus high-performance alternator and regulator, a Victron 3,000W MultiPlus-II inverter, rooftop solar, and Power Reserve protection. Grech describes the charging architecture, safety approach, and core control technology as common to both systems.

The practical distinction is how much stored energy is available before charging becomes necessary. A buyer who spends most nights connected to campground shore power may rarely exploit the full 20,480 Wh reserve. Longer stays away from hookups, frequent A/C use, and heavier electrical demands give the Terreno’s additional capacity more room to prove useful.

Starlink and Audio: What Comes Installed?

Connectivity is another distinction hidden behind similar terminology. POWER MAX includes Starlink ROAM hardware installed in the Terreno. The service subscription remains separate, but the satellite equipment is already part of the motorhome. POWER CORE makes the Vacanza 22 Starlink READY, so the wiring and provisions are there while the Starlink equipment and service are not included.

The audio difference also needs some precision. POWER MAX includes the Fusion® Hideaway Audio System with Bluetooth and Wi-Fi streaming. Grech’s current Vacanza 22 specifications, meanwhile, list a Premium Sound System, so the distinction is not between having audio and having none. The Terreno specifically adds the integrated Fusion system included with POWER MAX.

For buyers who expect to work remotely or spend significant time beyond dependable cellular coverage, having Starlink hardware installed from delivery can remove an additional setup step. Someone who does not need satellite internet immediately may place less value on that difference.

Air Suspension Is a Terreno-Only Chassis Upgrade

The Terreno includes electrically controlled rear air suspension as standard equipment, while Grech does not list it for the Vacanza 22. The system automatically adjusts ride height as loads change and is intended to support leveling and ride stability.

This is one of the few Terreno upgrades that affects the coach while it is moving rather than how it functions once parked. For buyers who expect to spend a lot of time on the road, that may matter more than some of the interior upgrades.

Where Else Does the Terreno Add Equipment?

Several smaller differences help explain the remaining distance between the two specifications. The Terreno has Automotion power window shades, while the Vacanza 22 uses Automotion manual shades. Terreno specifications also list a two-burner induction cooktop, compared with the Vacanza’s portable single-burner induction unit.

Entertainment differs as well. The Terreno pairs its 24-inch LED television with Apple TV, whereas the Vacanza specification lists the 24-inch television without Apple TV. Flooring also changes from vinyl woven flooring in the Terreno to Altro wood-look laminate in the Vacanza 22.

The waste systems take different approaches. Grech specifies a macerator system for the Terreno and a standard RV gate-valve dump system for the Vacanza 22. Neither changes the coach’s basic purpose, but these equipment differences are worth understanding before deciding whether the higher standard specification is useful to you.

Floor-plan choice may be more consequential. The Terreno is offered in Tour and Lounge configurations, while Grech currently lists the Vacanza 22 in Tour only. Buyers who specifically want the Terreno Lounge layout therefore have a reason to move beyond the Vacanza that has nothing to do with battery capacity.

What Does the Terreno’s Extra $30,000 Buy?

The price difference is concentrated in systems rather than space. Battery capacity is the largest measurable change, while the other upgrades affect suspension, connectivity, interior operation, and floor-plan choice.

The more useful question is how many of those upgrades you’d want anyway. Regular shore-power use reduces the advantage of the larger battery bank, while buyers who expect heavier electrical use may value it much more. The same logic applies to the Terreno’s other additions: their value depends on whether they solve a need you have.

That makes intended use more informative than feature count when comparing the two MSRPs.

Terreno or Vacanza 22: Which Fits the Way You Plan to Use It?

The Vacanza-ion 22 AWD is the more straightforward fit for buyers who want Grech’s 22-foot AWD Sprinter platform without paying for every Terreno upgrade. Its POWER CORE setup, shared chassis foundation, and lower starting MSRP make it a practical choice when campground hookups are common and the added Terreno equipment would see limited use.

The Terreno-ion AWD makes more sense when the upgrades already discussed align with how the coach will be used. Buyers who expect heavier electrical demand, more time away from hookups, or regular use of the additional factory-installed systems have more reason to consider the higher specification.

Buyers considering the longer end of the Grech lineup can also compare the Strada ION AWD and Vacanza ION 24 AWD, which applies a similar decision to Grech’s 24-foot models. For buyers focused primarily on energy capacity rather than coach size, GRECH POWER MAX vs. POWER CORE examines the two 51V systems in greater depth.