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The 2027 Grand Design Lineage Series M 25TK is designed for travelers who want the freedom of a compact Class C diesel motorhome without giving up the comfort, technology, and residential features that make longer trips enjoyable. At just 25 feet 8 inches long, the 25TK is sized for travelers who value maneuverability while still wanting a true bedroom, full bathroom, comfortable living area, well equipped kitchen, and room for guests.
Built on a Mercedes-Benz Sprinter 4500 chassis, the Lineage Series M combines Grand Design's approach to RV construction with the driving characteristics and technology of a modern diesel motorhome. The 25TK uses a twin turbo 2.0 liter inline four cylinder diesel engine paired with a 9G Tronic automatic transmission, providing 208 horsepower and 332 lb. ft. of torque.
For travelers throughout New England considering their first motorized RV or looking to move from a towable into a Class C, the 2027 Grand Design Lineage Series M 25TK offers a very different camping experience. At Outpost Outfitters in Gray, Maine, conveniently located just off I95 at Exit 63, customers can explore a motorhome built for everything from Maine weekends to extended road trips throughout New Hampshire, Vermont, Massachusetts, and well beyond New England.
One of the defining features of the 2027 Grand Design Lineage Series M 25TK is its flexible rear sleeping arrangement.
Instead of committing the entire rear of the coach to one fixed bed, the 25TK uses two individual twin beds that can convert into a large king sleeping area. This makes the floorplan unusually adaptable. Couples can create one large sleeping surface, while friends or family members traveling together can keep the beds separated.
The adjustable sleeping arrangement is especially useful for travelers who expect their RV to handle different kinds of trips throughout the year.
Up front, an additional cab over sleeping area provides room for guests without sacrificing the main living space. Combined with the rear sleeping area, Grand Design rates the 25TK to sleep up to four people.
During the day, power theater seating creates a comfortable place to relax, read, watch television, or simply enjoy the view from camp. The compact motorhome layout also means the cockpit becomes part of the living experience instead of feeling completely separate from the coach.
The result is a Class C diesel motorhome that works especially well for couples while still maintaining enough flexibility for occasional guests.
The 2027 Grand Design Lineage Series M 25TK brings together travel comfort and residential convenience in a relatively compact footprint.
Mercedes-Benz Sprinter 4500 foundation: The diesel chassis provides a more refined starting point for travelers who expect to cover significant highway mileage. The Lineage Series M is designed around confident road manners, maneuverability, and the convenience of having your transportation and accommodations combined into one vehicle.
Twin bed to king versatility: The rear bedroom can transition between individual sleeping spaces and a larger king configuration. This flexibility is difficult to achieve with a conventional fixed queen or king floorplan.
Full kitchen capability: The kitchen includes a large 12 volt refrigerator, cooking appliances, solid surface work areas, and useful pantry and cabinet storage. Instead of relying primarily on restaurants while traveling, owners have the equipment needed to prepare meals wherever the road takes them.
Innovative bathroom design: The 25TK uses a creative bathroom configuration to maximize usable room without unnecessarily lengthening the motorhome. Sliding partitions allow the space to be opened when needed and closed for privacy. It's a smart approach for buyers who want a functional shower and bathroom while keeping the overall coach compact.
Tankless hot water: An on demand water heater eliminates the need to wait for a small traditional water heater tank to recover. When properly connected to water and energy sources, it can make back to back showers and everyday washing more convenient.
Useful campground capacity: The 25TK carries approximately 36 gallons of fresh water, 30 gallons of gray water, and 35 gallons of waste water. Those capacities help provide flexibility when staying somewhere without complete hookups.
Outdoor living space: A 16 foot awning expands the usable campsite beyond the interior walls of the coach, providing shade and a comfortable place to relax outside.
The strongest argument for the 2027 Grand Design Lineage Series M 25TK may be how many different kinds of travel it can support.
At 25 feet 8 inches long and 7 feet 11 inches wide, it's substantially more manageable than a large Class A or Super C motorhome. That can make a meaningful difference when navigating small towns, fuel stations, parking areas, scenic destinations, and tighter New England campgrounds.
For couples planning extended road trips, the permanent rear sleeping area means you do not have to convert your primary bed every evening. For shorter weekends, the compact exterior dimensions can make getting away feel less complicated.
A motorized RV also changes how you travel between destinations. Passengers have access to the living area during stops, and once you reach camp there is no separate tow vehicle and trailer combination to disconnect. For shoppers coming from a travel trailer or fifth wheel, that simpler all in one approach can be one of the biggest reasons to move into a motorhome.
The 2027 Grand Design Lineage Series M 25TK is particularly compelling for travelers who want a premium couples coach that remains capable of accommodating occasional guests.
Whether your plans involve exploring the Maine coast, heading into the White Mountains of New Hampshire, traveling through Vermont, spending weekends in Massachusetts, or starting a much longer cross country trip, the 25TK provides a comfortable home base without requiring an oversized motorhome.
Visit Outpost Outfitters in Gray, Maine, just off I95 at Exit 63, to step inside the Lineage Series M 25TK and experience the difference between shopping from a floorplan and actually seeing how the coach feels from the driver's seat to the rear bedroom.
The 25TK is especially well suited to couples because of its rear twin beds that convert into a larger king configuration, comfortable living area, and compact overall size. However, the cab over sleeping area expands its usefulness for children, grandchildren, friends, or other occasional guests, with Grand Design listing sleeping capacity for up to four.
Twin beds make it easier for each person to enter and exit their sleeping space without climbing over the other person, while also providing flexibility for travelers who prefer separate beds. When a larger shared sleeping surface is preferred, the rear beds can be converted into a king configuration. This makes the 25TK particularly versatile for couples who sometimes travel with friends or have different sleeping preferences.
For many owners, yes. At approximately 25 feet 8 inches long, the Lineage Series M 25TK is considerably shorter than many Class A and Super C motorhomes. Its size can make fuel stops, campground maneuvering, parking, and travel through smaller towns easier. Buyers should still consider the coach's 11 foot 5 inch exterior height, 12,125 pound GVWR, turning requirements, and parking restrictions when planning trips.
