SUV stands for Sport Utility Vehicle. This type of vehicle was originally designed to combine enhanced off-road capability, a spacious interior, and a robust body structure. Although the term literally refers to a vehicle intended for both sporting and utility purposes, it now covers a very broad range of models. This is especially true given how dramatically the automotive market has evolved over the past few decades. So, let’s take a closer look at what an SUV is and which vehicles belong to this class.
Key features of SUV vehicles
The classic SUV body style, as originally envisioned by automotive engineers, is a body-on-frame construction. For those unfamiliar with vehicle engineering, this means a separate metal frame on which the body, suspension, and drivetrain are mounted. This is how the first off-road vehicles were built, and this type of construction is traditionally associated with the SUV segment. However, it is important to note that the boundaries between vehicle classes have become increasingly blurred, and models that look very similar can differ significantly in terms of their construction.
The traditional characteristics of a classic SUV included:
- Body-on-frame construction – high torsional rigidity and resistance to extreme loads.
- High ground clearance – typically 200 mm or more.
- Four-wheel drive with a transfer case – often including a locking center differential.
- Strong towing capability – typically between 3 and 5 tonnes.
- Powerful engines – traditionally V6 or V8 units, often combined with turbocharging and hybrid assistance.
That said, many vehicles that are officially sold and marketed as SUVs today are actually built on a unibody platform rather than a body-on-frame design. As a result, they lack both a separate frame and many of the traditional SUV characteristics listed above.
What is the difference between an SUV and a crossover?
In the past, the answer to this question was simple and straightforward: an SUV had a body-on-frame construction, while a crossover featured a unibody design based on a passenger car platform. Today, however, the distinction has become much less clear. Manufacturers and marketers have long used the term SUV for virtually any high-riding vehicle with a rugged, off-road-inspired appearance, regardless of whether it has a frame or not.
For a clearer understanding, the table below compares a traditional SUV with a crossover.
Parameter | Traditional SUV | Crossover (CUV) |
Construction | Body-on-frame | Unibody |
Platform | Pickup truck platform | Passenger car platform |
Off-road capability | Full off-road capability | Limited or even unsuitable for serious off-road use |
Towing capacity | Up to 5 tonnes or more | Up to 2–2.5 tonnes |
Fuel consumption | Higher | Lower |
Ride comfort | Lower | Better |
To illustrate this point, consider a few examples. Vehicles such as the Toyota RAV4, Honda CR-V, and Volkswagen Tiguan are officially marketed and sold as SUVs, even though their latest generations are technically crossovers built on a unibody platform. At the same time, few people would describe vehicles like the Chevrolet Tahoe or Toyota Land Cruiser as crossovers, since their body-on-frame construction remains a defining part of their identity.
Because of this overlap, the term SUV has effectively become a broad category that includes both traditional body-on-frame off-road vehicles and modern crossovers. If the construction of a specific model is important to you, it is always worth checking the technical specifications rather than relying solely on marketing descriptions.
Advantages of SUV vehicles
Whether built with a body-on-frame structure or a unibody design, SUV vehicles offer several practical advantages that have made them one of the most popular segments in the automotive market.
- Spacious interior – two or even three rows of seats with ample room for adult passengers.
- Higher driving position – provides better visibility of the road, a feature valued by many drivers.
- Versatility – equally comfortable for city driving and longer trips outside urban areas.
- Strong resale value – premium and full-size SUVs traditionally retain their value well on the used vehicle market.
Despite the rapid rise in popularity of crossovers, full-size body-on-frame SUVs continue to enjoy steady demand in many markets around the world. Autoline features thousands of SUV listings, ranging from traditional body-on-frame off-road vehicles to modern crossovers offered by sellers from across the globe.
Popular SUV models
Toyota Land Cruiser 300 – built on the TNGA-F body-on-frame platform, powered by a 415 hp twin-turbo V6 engine, with 235 mm of ground clearance. One of the most iconic traditional SUVs in the world.
Ford Expedition – a full-size body-on-frame SUV equipped with an EcoBoost V6 engine producing 400–440 hp, offering a towing capacity of up to 4.2 tonnes and seating for up to eight passengers.
Jeep Wrangler – a body-on-frame off-road vehicle with removable doors and roof panels, designed for serious off-road adventures.
Toyota RAV4 – one of the world’s best-selling SUVs, although in its latest generations it is technically a unibody crossover. A good example of how blurred the distinction between SUVs and crossovers has become.
Mercedes-Benz GLS – a premium full-size SUV with air suspension, combining impressive capability with the comfort and refinement of a luxury sedan.
Ultimately, when choosing between an SUV and a crossover, it is better to focus on the vehicle’s actual specifications rather than its marketing label. Key factors such as body construction, the presence of four-wheel drive with a low-range transfer case, and towing capacity are what truly determine a vehicle’s capabilities—not the category under which it is listed in a brochure or catalogue.