Fire Mountain Sierra 6 Burner vs Fire Mountain Sierra 4 Burner
We compare the Fire Mountain Sierra 6 Burner and the Fire Mountain Sierra 4 Burner across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.
At a glance
| Fire Mountain Sierra 6 Burner | Fire Mountain Sierra 4 Burner | |
|---|---|---|
| Our score | 9.3/10 | 9.4/10 |
| Best for | Regular garden barbecuing for family and guests | Regular garden barbecuing for family and guests |
| Not ideal for | Anyone short on storage space, or wanting charcoal flavour from a pure gas model | Anyone short on storage space, or wanting charcoal flavour from a pure gas model |
| Brand | Fire Mountain | Fire Mountain |
Specifications compared
| Fire Mountain Sierra 6 Burner | Fire Mountain Sierra 4 Burner | |
|---|---|---|
| Burners | 6 Gas | Four burners Quantity stated |
| Grates | Cast iron Material stated | Cast iron Type stated |
| Cooking area | 72 x 42 cm XL per title | 60 x 42cm Size stated |
Style and Setting
Fire Mountain Sierra 6 Burner
With the cooking capacity and grate material already set out in the key specifications, the next factor for this gas barbecue is how it fits different outdoor spaces and how that affects day-to-day use. The stated cooking area is 72 x 42cm, so it suits family-sized meals and wider cooking plans. Its XL outdoor format typically works best on garden patios, where there is enough room for movement around the grill. Cast iron grates typically feel substantial, yet they can demand careful cleaning to prevent residue build-up. In tighter balconies or narrow paths, placement and workflow may become awkward (not stated).
Fire Mountain Sierra 4 Burner
With the key specifications in mind, this gas barbecue is designed to suit a family-size outdoor grilling setup, including space for a main cooking area of 60 x 42cm and side shelves for food prep. Its stainless steel build is intended to provide a clean, modern appearance in UK gardens, patios and outdoor kitchens. Four burners support different cooking approaches, while the overall layout depends on leaving adequate clearance around the unit. The grill grates are cast iron, which is typically associated with good heat contact for everyday grilling, but they do require careful cleaning to avoid a build-up that can affect performance. This is a gas barbecue (LPG/propane), and the side burner is a separate burner with a pan ring rather than additional grill space. Outdoor use only is essential: keep the barbecue away from anything flammable, use it in open air, and turn off the gas supply at the bottle after use. Grease build-up can lead to flare-ups, so regular cleaning is important. Covering and storing the unit over winter helps prevent rust.
Size and Seating
Fire Mountain Sierra 6 Burner
The Fire Mountain is designed for larger outdoor cooking sessions, with a stated cooking area of 72 x 42cm (X-Large). Using six burners, it enables multiple items to be cooked at separate heat zones, which suits family-style meals and batch cooking. Seating capacity depends on the user's layout, as no specific table space or bench dimensions are provided. The grill's wide footprint can also demand additional patio clearance, so buyers should measure the available space before purchase.
Fire Mountain Sierra 4 Burner
The Fire Mountain is designed for family-sized grilling, with a main cooking area that measures 60 x 42cm. In practical terms, that cooking footprint allows larger cuts to be arranged without immediate overcrowding, and it supports planning multiple items across the available space. The seating capacity is influenced more by the chosen cooking pattern than by the grill footprint alone, because diners may want different foods at the same time. It can serve several people, while very large gatherings may still require extra cooking rounds.
Materials and Build
Fire Mountain Sierra 6 Burner
Materials and build matter because a barbecue's heat performance and long-term maintenance depend on what parts are made and how they are assembled. The gas barbecue is described as an XL outdoor BBQ with a 72 x 42cm cooking area, using stainless steel as the main body material, and cast iron grill grates. Stainless steel typically resists rust better, so daily weather exposure is less of a worry. Cast iron holds heat well, but it is heavier and requires proper cleaning to prevent grease and residue build-up. Assembly relies on secure fastening, because loose parts can wear faster.
Fire Mountain Sierra 4 Burner
The gas barbecue's Sierra 4 Burner uses stainless steel as the main body material, and it includes cast iron grates for the cooking surface, which can help with heat retention during grilling. The stainless steel frame is designed for routine outdoor weathering. Cast iron grates typically provide solid searing and more even hot spots, but they may also be heavier and require careful cleaning to prevent residue build-up.
Comfort and Features
Fire Mountain Sierra 6 Burner
Comfort and features centre on how straightforward the Fire Mountain is to use day-to-day, and how the cooking layout supports family-sized meals. The XL cooking area is 72 x 42cm, making it easier to grill multiple items together. Cast iron grates are designed to make steady contact with the heat, and six burners allow cooking zones so different timings can be managed at the same time, such as larger cuts on one side and smaller items on the other. The cooking layout can feel busy in smaller outdoor spaces, and careful setup and spacing are important.
Fire Mountain Sierra 4 Burner
Comfort and Features focuses on the day-to-day grilling tasks the Sierra 4 Burner is set up for in a family-sized layout. The cooking area measures 60 x 42cm, which allows multiple portions to be cooked at once without feeling cramped. Four gas burners provide flexible control for different heat levels, and cast iron grill grates offer a stable cooking surface suitable for regular use. Side shelves add practical workspace for prepping food and keeping items close to the grilling zone.
Who Is This For?
Fire Mountain Sierra 6 Burner
The gas barbecue suits families and groups who want to cook several items at once, rather than just a couple of portions. It is aimed at UK households with garden or patio space that can accommodate a large 72 x 42cm cooking area, where multiple trays, skewers, or sides can be cooked alongside mains. The six-burner layout is designed to support cooking by method. Cast iron grill grates are included to support steady searing. People cooking for small households may find the cooking area and burner layout unnecessary.
Fire Mountain Sierra 4 Burner
This BBQ suits people who want a family-sized outdoor grilling setup, with a 60 x 42cm cooking area and four main gas burners for everyday meals. It is aimed at households that regularly cook outside, and it benefits from side shelves that provide additional prep space. The stainless steel body is designed for solid day-to-day use. It is less suitable for small balconies because its overall size is not described as compact.
Fire Mountain Sierra 6 Burner: pros
- 6-burner
- Cast iron grates
- Instant heat and quick cleanup versus charcoal
Cons
- Gas bottle, regulator and hose are usually sold separately
- Needs covering or storing over winter to prevent rust
- Check the assembled size suits your space
Fire Mountain Sierra 4 Burner: pros
- 4-burner
- Cast iron grates
- Instant heat and quick cleanup versus charcoal
Cons
- Gas bottle, regulator and hose are usually sold separately
- Needs covering or storing over winter to prevent rust
- Check the assembled size suits your space
Our verdict
Our pick is the Fire Mountain Sierra 4 Burner (our score 9.4/10) - A practical gas barbecue (4-burner) for outdoor cooking. The Fire Mountain Sierra 6 Burner is still worth it if it is cheaper when you check, or if it better matches your specific needs.