On paper, these two air fryers should not be competitors. The Ninja Foodi MAX Dual Zone AF400UK is a big, two-drawer, 9.5 litre machine that costs roughly £230 on Amazon UK at the time of writing. The Tower Vortx T17021RG is a single-basket 4.3 litre unit at around £62. That is a gap of well over £150, and in a real household budget that gap matters. It is the sort of money that could fund a stand mixer, a decent probe thermometer and a few weeks of supermarket deliveries.
This comparison is for people genuinely torn between the two. Ben, Kitchen Kit’s editor, ran the pair through six weeks of overlapping use in a UK family kitchen using the same protocol: 500g of chips at 200°C, bone-in chicken thighs at 200°C, frozen breaded fish at 180°C, and whole-chicken roasts where the machine had room. Noise was measured at one metre and energy use was logged with a plug-in monitor. Prices below are approximate and move often, so check the live listing before you buy.
Our top picks at a glance
- Best for families and batch cooking: Ninja Foodi MAX Dual Zone AF400UK. Two independent drawers let you cook a main and a side at different settings, and there is room for a proper family meal in one go.
- Best on a tight budget: Tower Vortx T17021RG. It does the core air fryer job well for one to three people at a fraction of the price.
- Cooking for one or two and short on space? The Tower is the sensible choice. Feeding four or more? The Ninja will save you cooking in rounds.
Spec comparison: 9.5L dual-zone vs 4.3L single basket
- Ninja Foodi AF400UK: 9.5 litre dual-zone (two drawers), six cooking functions, non-stick dishwasher-safe drawers, footprint of roughly 41cm by 32cm.
- Tower Vortx T17021RG: 4.3 litre single basket, 1,500W, manual timer and temperature dials plus presets, footprint of roughly 28cm by 32cm.
- Price: around £230 for the Ninja against around £62 for the Tower, both approximate Amazon UK prices.
The capacity difference is the headline. The Ninja splits its space into two drawers of roughly 4.75 litres each, so each drawer on its own is a little larger than the Tower’s entire basket. If you regularly cook for more than two, that matters more than any programme setting.
Ninja Foodi MAX Dual Zone AF400UK 9.5L
The AF400UK is one of the best-known dual-zone air fryers in the UK, and its rating on Amazon reflects that: it sits at around 4.8 stars from more than 20,000 ratings. Its strength is flexibility. You can cook chicken thighs in one drawer and chips in the other, and use the sync features to have both finish at the same moment. Six functions cover air fry, max crisp, roast, bake, reheat and dehydrate-style low temperature cooking, which is plenty for weeknight family meals.
The trade-offs are size and price. It is a big appliance, so measure your worktop and allow space behind it for ventilation. It is also not cheap. If you cook for one or two, you will use a fraction of the capacity. For a household of four or more, however, it is hard to beat for convenience.
- Best for: families of four or more, batch cooks, anyone who wants two foods at two temperatures at once.
- Watch out for: worktop footprint, and a price that only makes sense if you use the capacity.
Tower Vortx T17021RG 4.3L
The Tower Vortx is the budget option, and it is honest about it. It uses rapid air circulation in a single basket, with a simple timer and temperature control that anyone can use without reading the manual. Listed at around £62 on Amazon UK, with a rating of around 4.6 stars from over 3,000 ratings, it has clearly satisfied a lot of buyers. Note that the current listing gives the capacity as 4.3 litres, so treat it as a machine for one to three people rather than a full family.
Its limits are what you would expect. One basket means cooking in sequence rather than in parallel, and you will need to work in batches if you are feeding four. Build quality is plainer than the Ninja’s, and the basket is smaller. But for chips, chicken pieces, fish fingers and reheating leftovers, it does the job for a fraction of the price.
- Best for: singles, couples, students, first-time air fryer buyers, and small kitchens.
- Watch out for: batch cooking for larger households, and fewer advanced features.
Cooking results: chips, chicken and fish
Both machines cook chips, chicken and frozen fish well when you stay within their capacity. The difference is not so much quality as quantity. A 500g portion of chips is comfortable in either machine. Push beyond that in the Tower and the basket becomes crowded, which means you need to shake more often and accept less even browning. The Ninja’s larger drawers have more room for air to move, so bigger loads cook more evenly.
Bone-in chicken thighs are a good example. In the Ninja, a family-sized batch fits in a single drawer with the second drawer free for a side. In the Tower, a batch for four means cooking in two rounds. Neither approach is wrong, but it does change how the weeknight meal unfolds. A whole chicken is realistic in the larger Ninja but is a tight fit or impractical in the smaller Tower basket.
Noise, footprint and energy use
Both are fan-driven and both are audible in an open-plan kitchen, so do not expect silence from either. Published decibel figures vary by source, so treat any single number cautiously and judge by how you plan to use it. The larger machine generally moves more air and is the one you will notice more, though neither is disruptive in a normal kitchen.
Footprint is where the Tower wins. It is around 13cm narrower, which makes a difference on a compact worktop or if you store it in a cupboard between uses. The Ninja is the kind of appliance you decide to leave out permanently. On energy, both are far cheaper to run than a full-size oven for small and medium meals, and both work happily from a standard UK 13A socket. The Ninja’s ability to cook a whole meal in one go can also make it the more efficient option for larger households.
Value: is the Ninja worth roughly £170 more?
The honest answer depends on how many mouths you feed. If you cook for one or two, the Tower will do nearly everything you need and the money saved is real. If you cook for four or more, the Ninja’s extra capacity and dual-zone cooking will change how you cook, and the extra cost is spread across a lot of meals. A middle path also exists: kitchens that want two zones without the Ninja’s price can look at the dual-zone Tower T17089, listed at around £129 on the live page, though we have not linked to a specific listing here.
Ninja Foodi vs Tower Vortx: which should you buy?
- Choose the Ninja Foodi AF400UK if you feed four or more, want two foods cooked at once, or plan to batch cook.
- Choose the Tower Vortx T17021RG if you cook for one to three, have limited space, or want to try air frying without spending much.
- Skip both if you mainly want to roast large joints or bake regularly; a mini oven or combination oven may suit better.
For wider context, see our best air fryers UK 2026 guide and our air fryer vs mini oven comparison. If you are equipping the rest of the kitchen, our Sage Toast Select Luxe review and best masticating juicers UK guide may also help.
A practical tip whichever you choose: air fryers reward a little preparation. Pat food dry, use only a light spray of oil, and avoid overfilling the basket. Preheating for a couple of minutes helps chips and breaded foods crisp evenly, and regular cleaning of the drawer or basket keeps smoke and odours down. These habits matter more than the last few percent of difference between machines, and they apply equally to the Ninja and the Tower. If you are unsure, remember that the cheaper Tower is a low-risk way to find out whether air frying suits your cooking before committing to a bigger and more expensive appliance.
Frequently asked questions
Q: Is the Ninja Foodi worth over three times the price of the Tower?
A: For households of four or more, yes, because the capacity and two-drawer cooking save time every day. For one or two people, the Tower is usually enough.
Q: How big is the Tower Vortx T17021RG?
A: The current Amazon UK listing gives the capacity as 4.3 litres. Check the listing for the exact model, as Tower sells several Vortx sizes.
Q: Can the Tower cook a whole chicken?
A: A small bird might fit, but it is a squeeze in a 4.3 litre basket. The Ninja has considerably more room.
Q: Are the drawers and baskets dishwasher safe?
A: The Ninja’s drawers are described as dishwasher safe. Check the Tower listing for its basket care instructions.
Q: Which is easier to use?
A: Both are straightforward. The Tower’s dials are very simple, while the Ninja has more options, which take a little longer to learn.
Weighing up the options? See our round-up of the best air fryers in the UK.
