The Gaggia Classic Evo Pro E24 is one of the best-selling single-boiler espresso machines ever – and has been for years. For 480 Euros (Germany) or 419 CHF (Switzerland), you get a compact, solid machine with a metal portafilter, a water tank of over two liters, and a community that has developed countless mods and upgrades. The problem: Out of the box, the machine doesn't deliver convincing temperature values. The good news: We'll not only show you where the issues lie, but also how you can get significantly more out of the Gaggia Classic with a few simple steps.
As always, we bought the machine ourselves and tested it according to our standardized test protocol v2.3. Especially with "cheaper" espresso machines, we also aim to provide you with methods to improve your machine. We've done this with the Gaggia Classic Evo Pro E24, building on our temperature tips, which we developed for the machine years ago.
Design & Workmanship
Score: 6.5/10
The Gaggia Classic Evo E24 is small. 21 centimeters wide, 36 centimeters high, 26 centimeters deep - with the plug just under 28.5, with the portafilter around 36 centimeters. It fits on any countertop. It weighs 8.1 kilos. That's enough for a stable stand and light enough to move around.
In terms of material, we see a mix: metal casing with bent sheet metal, sharp edges in some places - especially on the drip tray, where we actually cut ourselves. The gap dimensions show some fluctuations: three millimeters at the bottom of the rotary knob, half a centimeter at the top. Everything is a bit loosely built. But overall, the workmanship is solid. The buttons have a real pressure point, no token switches. It holds.
Pleasantly surprised: The drip tray holds 600 milliliters for this compact size. Some significantly larger and more expensive machines could learn a thing or two from that. And the water tank holds over two liters. That's enough for a good while.
Important: The Gaggia Classic Evo Pro E24 does not work with a standard 58mm portafilter, as the bayonet is thicker and slightly offset. However, you can use our KM professional baskets in the portafilter, for example.
Temperature Management: And How to Control It
Standard Score: 2.0/10 | Score with Flushing Routine: 5.4/10
Temperature is the central issue with this machine. The Gaggia Classic E24 is a single-boiler machine with a brass boiler and a pressostat. No PID, no temperature setting, no offset. The machine heats up, and you have to take what you get.
And what comes out, we measured directly in the portafilter with the Scace 2.
Test 1: Standard Protocol – simply switch on and brew
Five double espressos in 1-minute intervals, after 15 minutes and 40 seconds of heating time. This is how many people probably use the machine in everyday life.
| Extraction | Average Temperature |
|---|---|
| 1 | 95.8°C |
| 2 | 91.7°C |
| 3 | 90.6°C |
| 4 | 89.7°C |
| 5 | 88.2°C |
The first shot is 95.8°C. That's far too hot. At this temperature, the coffee will be burnt and extremely bitter. The brew group has built up so much heat during the heating time that the first water reaches almost boiling level.
After that, it swings to the opposite extreme. From shot to shot, the temperature drops. By the fifth extraction, we are at 88.2°C – significantly below the target range of 93°C. This means under-extraction: sour, thin, bodyless espressos. The difference between the first and the subsequent shots is 6.2°C – which is the worst category in the protocol.
In the WBC stress test (14 extractions quickly in a row), it becomes even more drastic: a temperature window of 8.5°C. For comparison: professional machines achieve under 1°C. This is not the intended use of this machine, and that can be stated very clearly.
| Cluster | Score | Max |
|---|---|---|
| A1 Cold Start | 0.0 | 3.3 |
| A2 Consistency | 0.0 | 2.0 |
| B Intra-Shot | 2.0 | 2.7 |
| C WBC-Stress | 0.0 | 2.0 |
| Total | 2.0 | 10.0 |
The only bright spot: within a single extraction, the temperature curve is relatively stable (2.0 out of 2.7 points). The problem is not what the machine does during the shot – but that it starts at the wrong level and drops from shot to shot.
Test 2: Improved Flushing Routine – How to Get More Out Of It
Now it gets exciting. Because with two simple adjustments, the picture changes dramatically:
- Before the first shot: flush for 7–8 seconds (instead of not at all or only 2 seconds)
- Between shots: wait 1.5–2 minutes (instead of 60 seconds)
Why does this work? In a single-boiler machine without temperature control, heat builds up in the brew group during the heating phase. If you then flush for 5–10 seconds, you release this superheated water. You can see it too: initially it hisses, as literally boiling or near-boiling water comes out of the group as steam. That's much too hot. When it flows steadily, you're in a good range. The longer waiting time between shots gives the small boiler the urgently needed recovery time. In the standard protocol, 60 seconds is not enough – the boiler can't keep up.
| Extraction | Standard | Improved | Difference |
|---|---|---|---|
| 1 | 95.8°C | 91.5°C | −4.3°C |
| 2 | 91.7°C | 92.3°C | +0.6°C |
| 3 | 90.6°C | 90.1°C | −0.5°C |
| 4 | 89.7°C | 90.5°C | +0.8°C |
| 5 | 88.2°C | 91.6°C | +3.4°C |
Here's the direct comparison with the optimized first shot: we manage to go from 95.8°C to 91.5°C. As a result, the extraction fits and the machine is no longer overheated. The difference to the average is only 0.8°C instead of 6.2°C. This way you manage the leap from "Insufficient" to almost "Very good" in the cold start category.
The fifth shot: from 88.2°C to 91.6°C. Instead of a too cold, underextracted laggard, you achieve an extraction almost at the level of the first extractions. 3.4°C improvement by just 30 seconds more patience.
Particularly impressive: The intra-shot curve for the fifth extraction with waiting time shows only 0.44°C fluctuation over 25 seconds of extraction. This is an almost perfectly straight line during extraction. This is technically ideal and achieves full marks.
The Gaggia Classic can deliver stable temperatures – if given enough time.
| Cluster | Standard | Improved | Change |
|---|---|---|---|
| A1 Cold Start | 0.0 | 2.7 | +2.7 |
| A2 Consistency | 0.0 | 0.0 | ±0.0 |
| B Intra-Shot | 2.0 | 2.7 | +0.7 |
| C WBC-Stress | 0.0 | 0.0 | — |
| Total | 2.0 | 5.4 | +3.4 |
From 2.0 to 5.4 points – that's +3.4 points of improvement through pure technique adjustment, without spending a cent.
What remains a weak point?
Consistency between shots (A2) remains at 0 points – shots 3-5 fluctuate by 1.5°C because shot 5 is significantly higher due to the longer waiting time. This is not a drama in everyday life, but it shows that the machine depends on your time management.
The temperature level is around 91°C instead of 93°C. Without PID, you cannot change this. With a PID kit like the Gaggimate, this could be corrected. We will also provide modding instructions for this in the future.
15 minutes warm-up time?
Yes, unfortunately, we can't avoid this long waiting time. We were also surprised, but the machine needs this time. If you start the procedure earlier, you will be below the target temperature that we aim for at around 93 degrees.
Espresso Quality
Score: 3.0/10
The espresso potential is directly linked to temperature management – and that brings down the score. Technically, there are no profiling options: no flow control, no pre-infusion, no pressure profiling. The machine brews with what the pressostat provides, at 8 to 9 bar.
But: If the espresso is right – and that certainly happens with the correct routine – then it's indistinguishable from what a 10,000-euro machine produces. That sounds provocative, but it's true. With the Gaggia Classic, you might hit the mark on 4 or 5 out of 10 shots. A more expensive machine will hit 9 out of 10. But the good shots are qualitatively equivalent.
So what distinguishes the Gaggia Classic from a 3,500-euro machine? Not its fundamental capability, but its consistency. More expensive machines stay focused within the target range and don't fluctuate up and down. Parallel frothing is possible with much more power. And with ten shots in a row, the more expensive machine will hit the target nine times.
Our recommendation for coffee selection: Stronger roast profiles. The machine operates at around 91°C if you flush it. This puts you in a good target range for espresso with darker roasts. Light specialty espressos, which often demand precise temperatures and frequently require temperatures around 93°C, are not its strength. In the test, we brewed with the Compadre - a strong profile that works very well with this machine.
Power Consumption
Score: 9/10
Here, the Gaggia Classic truly excels. For heating up plus a double espresso, it only draws 0.067 kWh – of which 0.058 kWh is for heating and only 0.009 kWh for the actual extraction. Typical for a small single-boiler machine that only needs to heat a tiny boiler. A well-deserved 9 out of 10 points.
Interestingly: You wait 15 minutes for the machine, but consume hardly any electricity. The heating time is long for the small boiler, but the energy requirement is negligible.
Milk Froth & Steam
Score: 4.8/10
Frothing is quite doable, but it requires practice and rhythm. As a single-boiler machine, the boiler must first heat up to steaming temperature after espresso extraction, which takes about 60 seconds. Then you have another 60 seconds for the actual frothing.
First hurdle: condensation. Around 8 milliliters come out in the first one to two seconds. Therefore, purging the steam wand beforehand is a must. Then you have solid power initially, which you absolutely must use. The pitcher must be strongly tilted so that the stretching and rolling phases occur simultaneously. After 15 to 20 seconds, the power drops. It picks up slightly again, but with larger pitchers, you won't achieve deep swirling.
The result: creamy, pleasant milk foam. Very important: After frothing, rinse thoroughly and wait one to two minutes before brewing again.
Workflow & Operation
Score: 7.0/10
Here, the Gaggia Classic scores with its simplicity. One button for espresso, one button for steam, two indicator lights. That's it. No menus, no settings, no display: switch on, wait, brew.
The water tank holds over two liters and is easily removable. The drip tray is generously sized at 600 milliliters. The portafilter locks in cleanly. There's no volumetric control or timed extraction. You press the button, the machine brews, you press it again. If you want to work precisely, you'll need a scale under the cup.
What's missing: there's no cleaning program, no shot timer, no dosing option. This is to be expected for this price range.
Accessories
Score: 4.0/10
Included: Portafilter with double spout, double basket, single basket, and a tamper. The basket is cheap. We recommend an early upgrade with a cleanly perforated professional basket. The tamper, while fitting snugly into the portafilter, is otherwise more suitable for hanging your coat. It's yet another one of those cheap plastic tampers that dampen the joy of the drink even before brewing the espresso. But: It's included, so you can get started right away.
Noise Level
Score: 2/10
69 decibels, which is rather loud. Just a typical vibratory pump. It behaves as it behaves. If you want to brew quietly in the morning while the rest of the family sleeps, you're out of luck.
Volume Potential / Catering
Score: 0.5/10
The Gaggia Classic cannot handle the WBC protocol. 14 shots quickly in a row makes no sense with this single-boiler machine. A fixed water connection is not provided, and the steam endurance is also lacking for continuous use. This is not its intended use.
Practical Tips for Everyday Use
Based on all measurements, here is the optimal workflow:
Heating: 15 minutes. After 15 minutes, the portafilter is at 65–70°C.
Before the first shot: Flush for 7-8 seconds until it no longer hisses. This removes the superheated water. When it flows steadily, lock it in and brew.
Between shots: Don't rush. Wait at least 1.5–2 minutes. Unlock, flush briefly for 1–2 seconds, then go to the grinder, prepare the coffee, tamp – this way the 45–90 seconds pass almost by themselves.
Coffee Choice: Stronger roast profiles. The machine operates at around 91°C – which is perfect for darker roasts. Light specialty roasts are not its strength.
Steaming: After steaming, rinse thoroughly, stabilize the temperature, and wait one to two minutes before the next espresso. The boiler needs to recover from steaming operation.
Don't forget the grinder: This machine needs a solid grinder. If everything fluctuates – temperature, grind size, dose – it becomes difficult to reproduce good results. Something needs to give the setup stability. In the single-dosing range, there are very good options for 250–300 Euros.
Conclusion: Honest, compact – and good with method
Overall Score: 4.8/10 – Compromise | Price-Performance: 7.0/10
The Gaggia Classic E24 scores 4.8 out of 10 points in our test, placing it in the "Compromise" quality class. Without the right method, this machine simply doesn't deliver convincing results.
But this is also where the opportunity lies: with the improved flushing routine, the temperature score alone increases from 2.0 to 5.4 points, without spending a cent. The machine is extremely energy-efficient (9/10 for electricity), more compact than almost any other, solidly built for its price, and its operation couldn't be simpler.
Most importantly: the machine's basic technology has potential and can be improved or "surfed." And with that, the Gaggia Classic Evo Pro E24 opens many doors into the world of espresso.
Who is this machine for? For beginners who are willing to delve into the topic. Who want to find their rhythm with the machine. Who understand that flushing is not an option, but a necessity, and who will add a solid grinder.
The espresso you get from this machine with the right handling is impressive. Not every shot will be perfect, but the good shots are qualitatively equivalent to what a machine ten times the price delivers.
And for those who want even more: PID kits like the Gaggimate get significantly more out of this base. We will also publish modding instructions in the future, as the Gaggia Classic is one of the best platforms for step-by-step upgrades.
You have to get to know each other, find your rhythm. And that's perhaps even the exciting part.
Technical Specifications at a Glance
| Property | Value |
|---|---|
| Price | 480 EUR (D) / 419 CHF (CH) |
| Boiler Type | Single Boiler (Brass) |
| Heat-up Time | 15:40 minutes |
| Power Consumption | 0.067 kWh (Espresso Mode) |
| Brewing Temperature | ~91°C (measured, with flushing routine) |
| Power | 1,100 W |
| Weight | 8.1 kg |
| Water Tank | 2.1 Liters |
| Drip Tray | 600 ml |
| Pump | Vibratory Pump |
| Dimensions (W×D×H) | 21 × 26 × 36 cm |
| Noise Level | 69 dB(A) |
| Special Features | Pressurestat, no PID, no offset, no profiling |
Gaggia Classic Evo Pro E24
Review Summary, Protocol 2.3 (January 2026)🛠️ Recommended specialist partner for the Gaggia Classic E24
Germany: Stoll Espresso
We recommend specialist partners whom we know to provide good work and reliable service. When ordering via our affiliate links, you don't pay more, but we receive a small commission – which we invest directly into new test equipment.
All measurements performed according to Kaffeemacher test protocol v2.3. Temperature measurement with Scace 2, power measurement with Christ CLM1000 Professional. Evaluation based on the 3-cluster scoring model.
