Grand Design Lineage 25TK Review: Smartest Compact RV of 2025

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Exterior view of a Grand Design Lineage 25TK Class C motorhome parked inside a manufacturing facility, featuring a sleek white design on a Mercedes-Benz chassis, blacked-out wheels, an outdoor entertainment center, and the "LINEAGE" logo prominently displayed above the cab.

Table of Contents

25TK BEDROOM
25TK BATHROOM
25TK KITCHEN
25TK LIVING
25TK EXTERIOR

Grand Design Lineage 25TK

If you think you’ve seen it all in the world of motorized RVs, think again! The Grand Design Lineage 25TK just dropped, and it’s redefining small-space travel.

From a fully convertible bathroom to a twin-to-king adjustable bed system, this is not your typical Class C. Here’s a closer look at why RVers are calling this the coolest (and smartest) mini motorhome on the market.

Order and Save on Your New Grand Design Series M 25TK

Twin to King Bed That Actually Works

The “TK” in 25TK stands for Twin King, it’s a bed that is so much more than just a clever name. Two 36″x80″ twin beds (residential size!) convert into one massive king bed using a central plank.

Each bed features a power-adjustable headboard, household and USB outlets, and symmetrical storage options. It’s ideal for solo travelers, couples, or RVing cruisers who want flexibility and real comfort.

Other Thoughtful Bedroom Details

True residential bed length and size
Optional cupholders in bed conversion plank
Whisper-quiet residential AC
Smart TVs in multiple zones

The Bathroom That Broke the Mold

This bathroom isn’t just smart, it’s genius. Grand Design made use of every space, even “hallway” space, by transforming what would be walkway into an Aqua Haven Shower . This walk-through corridor can be used as a dry bath, wet bath, or full standing rain shower.

Built with all-aluminum cabinetry, teak flooring, and waterproof walls, the entire space is designed to get you squeaky clean without getting everything wet or creating damage. And major bonus, it’s fully enclosed, heated, and lit for year-round use.

Top-down floorplan view of the Grand Design Lineage 25TK motorhome featuring a front cab with overhead bunk, a central living area with dual recliners, a kitchen with stove and sink, a bathroom with a rounded shower, and a rear tilt bed adjacent to wardrobe storage
Modern RV shower featuring a sleek black vertical fixture with handheld spray and controls, complemented by a ceiling-mounted rain showerhead and ambient LED lighting, with RV Nerd branding and the caption “AND CEILING MOUNTED RAIN SHOWER!” at the bottom of the image.
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Fully Equipped Kitchen for Real Cooking

While some compact RVs skimp on kitchen space, the 25TK keeps it functional and refined. You get a 10 cu. ft. 12V compressor fridge, combo convection microwave/air fryer/oven, pull-out pantry, and flush-mounted counter extension.

Thoughtful additions like a designated trash can space and high-end dovetail cabinetry elevate both convenience and the design.

Close-up view of a Lineage RV kitchen showcasing a stainless steel sink with a black pull-down faucet, extended countertop with built-in cutting board, dual-burner stove, microwave, and open drawers and cabinets revealing additional storage space beneath the counter.
Interior kitchen of a Lineage RV featuring light wood cabinetry, a black high-arc faucet over a stainless steel sink, a dual-burner cooktop with range hood, a microwave, a large black double-door refrigerator, an overhead TV, and a window providing natural light.

Other Thoughtful Kitchen Details

Smart TVs in multiple zones
Flush-mounted wastebasket drawer
Kitchen counter extension
Full extension pantry drawers

Close-up of an RV microwave installed below a stovetop, with the door open to reveal protective packaging inside, a turntable, and digital controls displaying the time 14:18; situated in a modern kitchenette setup with light wood cabinetry.

Living Recliners That Actually Recline

Forget stiff dinettes and clunky jackknife sofas. The 25TK features power reclining, wall-hugging theater seats with seatbelts, cupholders, and an optional center support armrest. These seats are ultra-plush and even offer a tilt-up headrest for easy TV viewing or napping. You can also opt for a functional dinette setup if preferred.

Dual reclining theater seats in an RV featuring light gray upholstery, individual cup holders, and detachable swivel tray tables, positioned in front of large windows for natural light and scenic views.
Dual reclining theater seating in an RV, with the right seat fully extended for lounging, featuring plush gray upholstery, cup holders, and a stowed swivel tray table on the left armrest, positioned near large windows and the entryway.

Other Thoughtful Living Details

Convertible theater seating or dinette options
Power blackout cab shades
Overhead cab bunk w/ ladder and airflow

Interior view of a motorhome cab area with black leather driver and passenger seats, a central ladder leading to an overhead bunk with a privacy curtain, and part of a recliner and countertop visible on either side of the image.

Tech That’s Useful

600W of factory solar
Rockford Fosgate sound system
310Ah lithium battery
Factory-installed Starlink

Built to Last and Made to Use

Constructed on a Mercedes 4500 chassis (not the typical 3500), the 25TK offers increased structural integrity and payload.

It also features the seal gasket system, replacing standard self-leveling sealant to minimize leaks and maintenance.

Lineage 25TK vs. Typical Class C: How It Stacks UP

We took a closer look at how the Grand Design Lineage 25TK compares to a traditional Class C motorhome. Here’s a breakdown of what you get:

Bar chart comparing the Grand Design Lineage 25TK to a typical Class C RV in terms of factory-installed solar power and battery capacity. The Lineage 25TK shows significantly higher values, with 600W of solar and 310Ah battery capacity, compared to 200W and 100Ah for a typical Class C.

Quick Takeaways

3x the solar power and battery life
Standard Starlink and smart integrations
Innovative space-saving bathroom layout
True residential bed length and size
Quiet, well-insulated cabin and cockpit

Bar chart titled "Feature Comparison: Lineage 25TK vs. Typical Class C RV" showing six categories—Bed Size, Bathroom Type, Chassis, Sound System, Window Insulation, and Slide Usage in Road Mode—where the Lineage 25TK scores a perfect 5 across all features, while the Typical Class C RV scores between 2 and 3 in each category.
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Driver side view of a Grand Design Lineage 25TK Class C motorhome inside a factory, with slide-out extended, showcasing its white body on a Mercedes-Benz chassis, storage compartments open, and the "LINEAGE" branding above the cab.

The Grand Design Lineage 25TK isn’t just another compact RV, it’s next level creative engineering with modern flare.

Whether you are a tech-savvy traveler or a minimalist who enjoys peace and quiet on the road, this rig is equal parts luxury and practicality. This is also your nudge to plan your next adventure!