How to Choose an Espresso Machine in 2026

Espresso machines in a shop window look close to identical: a portafilter, a steam wand, a drip tray, and a badge claiming 15 bar. A short list of published figures accounts for most of the difference in how they behave — pump pressure, portafilter diameter, the heating system, tank capacity and rated power. This guide explains what each one physically changes, then lays three machines out side by side so you can match the numbers to your own counter.

Pump pressure says less than the badge suggests

Almost every domestic machine publishes 15 bar, including all three here, so on its own the figure separates nothing. It describes what the vibratory pump can generate, not what arrives at the coffee. The more informative number is the second one: Breville publishes 9 bar extraction, and Gaggia publishes an over-pressure valve calibrated to 9 bar. Around 9 bar at the puck is the pressure espresso is defined around, and both makers are telling you the machine regulates down to it.

De’Longhi publishes only the pump figure for the Stilosa. That is not evidence of a worse machine, but it does mean this axis cannot be compared across all three before buying.

Portafilter diameter decides what you can bolt on later

Two sizes dominate: 54 mm, which Breville uses here, and 58 mm, the commercial standard on the Gaggia. The diameter has no effect on the coffee by itself — it determines which baskets, tampers, distribution tools and bottomless portafilters fit. At 58 mm the aftermarket is enormous because it matches café equipment. At 54 mm it is smaller but well supplied.

De’Longhi does not publish a diameter for the Stilosa, so third-party accessories are guesswork until the machine is in front of you with a ruler.

Where this stops mattering: if you plan to use the supplied basket and the supplied tamper and never change either, diameter changes nothing you will notice.

The heating system sets how long you wait

This is where the three genuinely diverge. Breville’s ThermoJet is a thermoblock, published as reaching extraction temperature in 3 seconds — water is heated as it passes through rather than held hot in a vessel. Gaggia uses a lead-free brass boiler drawing 1425 W, which stores heat instead: slower to come up, steadier across consecutive drinks, and made of a metal that survives being taken apart, which is why replacement parts for this design are widely stocked. De’Longhi publishes a stainless steel boiler at 1100 W and no warm-up figure at all.

Read this spec as a trade between waiting and stability. A thermoblock suits someone making one or two drinks and leaving. A boiler suits someone making four in a row, because a thermoblock’s recovery between steaming and brewing is the part that shows.

Tank capacity is a refill interval, nothing more

A double shot draws roughly 2 oz of water and steaming milk adds more, so a 33.81 oz tank covers something like a dozen drinks and a 72 oz tank covers a long weekend for one person. Nothing about the capacity reaches the cup.

It becomes a real constraint in two situations: when the machine lives somewhere awkward to carry water to, and when several people use it in the same hour. Otherwise it is the spec that matters least here.

Matching the specs to your kitchen

The useful question is which constraint binds hardest for you, rather than which machine is furthest up a list.

• The machine has to be ready when you are — the heating system, and specifically whether a warm-up figure is published at all.
• You want to learn technique and add tools — portafilter diameter, because it governs the entire accessory ecosystem.
• You expect to repair rather than replace — boiler material, since brass and stainless designs are built to be opened.
• Several people use it back to back — boiler type and tank capacity together, as recovery time and refills both compound.
• Counter space is the hard limit — published dimensions and tank size, since the tank is usually what makes a machine deep.

The spec table above carries the published figures for each of these axes.

Frequently asked questions

Do any of these include a grinder?

None of the three publish a built-in grinder, so all of them assume pre-ground coffee or a separate grinder. This matters more than people expect: pre-ground coffee stales within days, and grind size is the main variable you adjust to fix a shot, so a machine with no grind control leaves you very little to work with.

How much technique does each one need?

The published specs give a rough signal. Breville publishes automatic milk texturing and dual-wall baskets, both of which reduce the number of variables you control. Gaggia publishes a commercial-diameter portafilter and a manual steam wand, which leaves every variable in your hands. Expect to spend coffee dialling in any machine where you control grind, dose and tamp.

Is descaling really necessary?

Skipping it is not recommended by any of these makers. Mineral deposits from tap water gradually restrict the boiler and the group path, and the repair costs far more than descaling solution. Every machine here needs it on a schedule, and more often where tap water is hard.