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Comparison

Ninja SL400UK vs Ninja AF451UK vs Tefal EY901N40: specifications

Manufacturer-listed specifications for Ninja SL400UK, Ninja AF451UK, Tefal EY901N40, presented by product with source links.

By MainBuyer Editorial TeamPublished 6 October 2026Updated 6 October 2026Research-based assessment
Products referenced

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Specifications side by side

The approved specifications are grouped by topic below. Entries may describe different features or use different units. A missing entry means this article has no approved claim for that topic, not that the product lacks a feature.

Manufacturer-listed specifications by topic
TopicNinja SL400UKNinja AF451UKTefal EY901N40
Capacity
  • The total capacity is 9.5L, made up of two 4.75L drawers.
  • Each 4.75L drawer can fit a 1.4kg roast chicken.
  • The air fryer has a 9.5L capacity.
Not covered in this article’s approved evidence.
Dimensions
  • Product dimensions are 46.99 cm L x 27.99 cm W x 38.51 cm H.
  • Its dimensions are 50.8 cm in length, 40.59 cm in width, and 41.5 cm in height.
  • The dimensions (L x W x H) are 418mm x 402mm x 305mm.
  • The power cord length is 0.9m.
WeightNot covered in this article’s approved evidence.
  • The product weighs 12.9 kg.
Not covered in this article’s approved evidence.
Power
  • The unit is rated at 240 volts, 2,470 watts and 11 amps.
  • The device draws 11 amps of current.
Not covered in this article’s approved evidence.
Documented modes
  • The air fryer offers 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate and Reheat.
  • The SYNC function makes both drawers finish cooking at the same time.
  • The MATCH function applies the same settings to both drawers to cook larger quantities of one food.
  • It offers six cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate, and Reheat.
  • A Sync Finish function lets two foods cooked with different settings in the two drawers finish at the same time.
Documented controls
  • The two drawers are individually controlled, allowing different cooking functions, times and temperatures in each drawer.
  • It can cook two foods in two different ways, with both finishing at the same time.
Not covered in this article’s approved evidence.
Documented components
  • The box contains the main unit, 2 x 4.75L non-stick drawers, 2 x non-stick crisper plates, 2 x multi-layer racks and an instruction booklet.
  • It includes a digital cooking probe that monitors food temperature during cooking.
Not covered in this article’s approved evidence.
Documented design details
  • The air fryer has 2 drawers stacked vertically rather than side by side.
  • Food can be cooked on 4 levels at the same time by layering it using the 2 included racks.
Not covered in this article’s approved evidence.Not covered in this article’s approved evidence.
SourceNinja SL400UK manufacturer sourceNinja AF451UK manufacturer sourceTefal EY901N40 manufacturer source

Ninja SL400UK

  • The air fryer offers 6 cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate and Reheat.
  • The total capacity is 9.5L, made up of two 4.75L drawers.
  • Each 4.75L drawer can fit a 1.4kg roast chicken.
  • Product dimensions are 46.99 cm L x 27.99 cm W x 38.51 cm H.
  • The unit is rated at 240 volts, 2,470 watts and 11 amps.
  • The box contains the main unit, 2 x 4.75L non-stick drawers, 2 x non-stick crisper plates, 2 x multi-layer racks and an instruction booklet.
  • The air fryer has 2 drawers stacked vertically rather than side by side.
  • The two drawers are individually controlled, allowing different cooking functions, times and temperatures in each drawer.
  • The SYNC function makes both drawers finish cooking at the same time.
  • The MATCH function applies the same settings to both drawers to cook larger quantities of one food.
  • Food can be cooked on 4 levels at the same time by layering it using the 2 included racks.

Ninja AF451UK

  • The air fryer has a 9.5L capacity.
  • It offers six cooking functions: Air Fry, Max Crisp, Roast, Bake, Dehydrate, and Reheat.
  • It includes a digital cooking probe that monitors food temperature during cooking.
  • The product weighs 12.9 kg.
  • Its dimensions are 50.8 cm in length, 40.59 cm in width, and 41.5 cm in height.
  • The device draws 11 amps of current.
  • It can cook two foods in two different ways, with both finishing at the same time.

Tefal EY901N40

  • A Sync Finish function lets two foods cooked with different settings in the two drawers finish at the same time.
  • The dimensions (L x W x H) are 418mm x 402mm x 305mm.
  • The power cord length is 0.9m.

Manufacturer sources

Bottom line

These are manufacturer-listed specifications. This overview does not report hands-on testing or make a recommendation.

Methodology

How this article was prepared

This is a research-based MainBuyer article using current web evidence, official product information and verified MainBuyer product records. It does not claim hands-on laboratory testing.

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