Fire Mountain Sierra 6 Burner
A practical gas barbecue (6-burner) for outdoor cooking.
The Best 6-Burner Gas BBQs (UK 2026)
A 6-burner gas BBQ is built for entertaining - a big grill area, multiple heat zones and enough capacity to feed a crowd in one go. Here's what to look for and our top large gas barbecue picks.
Quick answer
Six or more burners suit regular entertaining and large families, letting you cook a lot of food at once across several independent heat zones. CosmoGrill's Platinum range and similar large multi-burner models lead here. Look for individually controlled burners, cast iron grates, a solid trolley with storage, and be realistic about the space it needs and the gas it uses.
What to look for
At this size, heat distribution matters more than headline power - look for individually controlled burners and good build across the whole cooking area. Cast iron grates are worth having on a grill this big. Check the assembled footprint carefully, as 6-burner barbecues are wide. Consider a model with a side burner and decent storage, and remember a larger grill gets through gas faster, so a bigger bottle makes sense.
How we pick
We rate large barbecues on cooking capacity, heat control across the grill, build quality, features and value. Every pick is a genuine 5 or 6-plus burner gas barbecue.
Our top picks
#1
#2 
CosmoGrill Pro Deluxe 6+1
A practical gas barbecue (6 burners + 1 side burner) for outdoor cooking.
#3 
CosmoGrill Platinum 8 Burner
A practical gas barbecue (6 burners + 2 side burners) for outdoor cooking.
#4 
CosmoGrill Platinum 6 Burner
A practical gas barbecue (4 burners + 2 side burners) for outdoor cooking.
#5 
CosmoGrill NEW Emberr 7
A practical gas barbecue (6 burners + 1 side burner) for outdoor cooking.
Frequently asked questions
Do I need a 6-burner gas BBQ?
Only if you regularly cook for large groups - six burners give a big grill area and multiple heat zones, ideal for entertaining or a large family. For most households a 3 or 4-burner is plenty and takes up far less space. A 6-burner is wide, uses more gas, and costs more, so choose one for genuine capacity needs rather than the burner count alone.
Does a bigger gas BBQ use more gas?
Yes - more burners running means higher gas consumption, so a 6-burner will empty a bottle faster than a 2-burner used the same way. That said, you rarely run every burner at full, and cooking for a crowd in one go is more efficient than several batches on a small grill. If you have a large barbecue, a bigger gas bottle saves frequent swaps.
Bottom line
Our top pick is the Fire Mountain Sierra 6 Burner (our score 9.3/10) - A practical gas barbecue (6-burner) for outdoor cooking..