Many renters might think that they are reserving a specific car, but actually, they are just reserving access to a certain vehicle category. This little misunderstanding between what they expect and how the rental company operates is often what causes confusion.
The core confusion between ‘guaranteed model’ and ‘or similar’
In most cases, the way cars are segregated in the rental industry depends on the car category rather than the car class. Here's a simple explanation of the main difference between a ‘guaranteed model’ and an ‘or similar’:
What ‘or similar’ means?
Rental companies organize their vehicles into different categories based on similar features. When you choose options like ‘or similar,’ the company has the flexibility to assign any vehicle within that category, no matter the brand or model. This makes the process more adaptable and convenient for you.
What is matched – Class, transmission, fuel
A vehicle listed as ‘or similar’ usually conforms to the following specifications:
| Vehicle class or size, such as economy, compact, SUV, etc. | Fuel types like petrol, diesel, hybrid, or EV | Transmission type, such as an automatic or manual transmission | Seating and door count (in most cases) |
What is not guaranteed
Under ‘or similar’, the following are not guaranteed:
- Exact make or model
- Specific brand
- Boot space
- Driving feel or performance
What does the ‘guaranteed model’ mean?
A ‘guaranteed model’ means the rental company assures you of a particular make and model of the vehicle if specific conditions are fulfilled, offering more certainty than just a similar car from the same category.
What happens if the guaranteed model is unavailable?
Potential options provided by the rental company
If the exact car model you are looking for is not available, the vehicle hire company might suggest one of the following alternatives:
- A free upgrade to a higher vehicle segment.
- An alternative model or a similar higher car category.
- Complete refund or free booking cancellation.
Things renters cannot demand
Even when you have a guaranteed model booking, renters still are not entitled to:
- Feature-by-feature similarity.
- A particular alternative model that they can choose from.
- Price reductions for perceived inconvenience.
Side-by-side comparison – Guaranteed model vs ‘Or similar’
| Factors | Guaranteed model | ‘Or similar’ |
|---|---|---|
| Availability | Available only where that model exists; it may still fail due to late returns or damage. | High availability is facilitated by multiple eligible vehicles within the same category. |
| Price | A higher figure reflects a premium due to lower uncertainty. | Lower, designed for flexibility and fleet efficiency. |
| Flexibility | Low, because the fixed model limits substitution options. | High as it permits the rental company to assign any vehicle that meets the specifications. |
| What you can expect at pickup | Exact make and model, but different color, trim, or features. | Any vehicle that matches the category, transmission, fuel type, and seat count. |
| Best use cases | Luxury rentals, electric vehicles (EVs), business travel, special events, and brand-specific requirements. | Budget travel, quick getaways, airport transfers, and adaptable itineraries. |
Final takeaway
You may select a ‘guaranteed model’ when your trip really depends on having the exact car. This is especially helpful for luxury rentals, electric vehicles, business trips, or special occasions where the brand, size, or driving experience matters most. Opt for ‘or similar’ when you are okay with flexibility, especially if value is your top priority over the specific car for short trips, airport rentals, city driving, or budget-friendly travel options.
