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 does not deliver convincing temperature values. The good news: We will show you not only where it falls short – but also how you can get significantly more out of the Gaggia Classic with just a few simple steps.
As always, we bought the machine ourselves and tested it according to our standardized test protocol v2.3. Especially with "more affordable" espresso machines, our aim is to provide you with methods that make your machine better. We have done this with the Gaggia Classic Evo Pro E24, building on our temperature tips, which we developed for the machine years ago.
Design & Build Quality
Score: 6.5/10
The Gaggia Classic Evo E24 is small. 21 centimeters wide, 36 centimeters high, 26 centimeters deep - just under 28.5 with the plug, around 36 centimeters with the portafilter. It fits on any countertop. It weighs 8.1 kilograms. That is enough for a stable base and light enough to move.
When it comes to materials, we see a mix: metal housing 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 dial, half a centimeter at the top. Everything is built with a bit of clearance. But overall, the build quality is solid. The buttons have a real pressure point, they are not just for show. That lasts.
Positively surprised: The drip tray holds 600 milliliters at this compact size. Some much larger and more expensive machines could learn a thing or two from this. And the water tank holds over two liters. That lasts quite a while.
Important: The Gaggia Classic Evo Pro E24 does not work with a standard 58mm portafilter because the bayonet is thicker and slightly offset. However, you can insert our KM professional baskets into the portafilter, for example.
Temperature management: And how you control it
Score Standard: 2.0/10 | Score with flushing routine: 5.4/10
Temperature is the central theme of this machine. The Gaggia Classic E24 is a single-boiler machine with a brass boiler and a pressurestat. No PID, no temperature setting, no offset. The machine heats up and you have to take what comes.
And what comes, we measured directly in the portafilter with the Scace 2.
Test 1: Standard protocol – simply switch on and start brewing
Five double espressos at 1-minute intervals, after a heat-up time of 15 minutes and 40 seconds. Just as many people probably use the machine in everyday life.
| Shot | 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 is way too hot. At this temperature, the coffee is burnt and extremely bitter. The brew group has built up so much heat during the heat-up time that the first water reaches almost boiling level.
After that, it tips into the opposite. The temperature drops from shot to shot. By the fifth shot, 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 settled shots is 6.2°C – which is the worst category in the protocol.
In the WBC stress test (14 shots in quick succession), it becomes even more drastic: a temperature window of 8.5°C. For comparison: professional machines manage under 1°C. This is not the intended area of application for this machine, and that can clearly be said.
| 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 shot, 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 you 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 none at all or just 2 seconds)
- Between shots: Wait 1.5–2 minutes (instead of 60 seconds)
Why does that work? In a single-boiler machine without temperature control, the heat builds up in the brew group during the heat-up time. If you then flush for 5–10 seconds, you drain this overheated water. You can see it too: At the beginning, it hisses, as downright boiling or almost boiling water comes out of the group as steam. That is way too hot. When it flows evenly, you are in a good range. The longer waiting time between shots gives the small boiler the urgently needed regeneration time. In the standard protocol, 60 seconds are not enough – the boiler cannot keep up.
| Shot | 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 is the direct comparison with an optimized first shot: we manage from 95.8°C to 91.5°C. As a result, the shot fits and the machine is no longer overheated. The difference from the mean value is now only 0.8°C instead of 6.2°C. That's how you manage the leap from "Inadequate" 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, under-extracted straggler, you reach almost a shot at the level of the first ones. 3.4°C improvement with just 30 seconds more patience.
Especially impressive: The intra-shot curve of the fifth shot with waiting time shows only a 0.44°C fluctuation over 25 seconds of extraction. That is an almost perfect straight line during the extraction. That is a technical ideal and achieves full points.
The Gaggia Classic can deliver stable temperatures – if you give it 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 a +3.4 point improvement through pure technique adjustment, without spending a cent.
What remains as a weak point?
The 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 wait. This is no 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 a PID, you can't change that. With a PID kit like the Gaggimate, this could be corrected. We will also provide modding guides for this in the future.
15 minutes heat-up time?
Yes, unfortunately, we cannot get around this long waiting time. We were also amazed, 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 the temperature management – and that lowers the score. Technically, there are no profiling options: no flow control, no pre-infusion, no pressure profiling. The machine brews with what the pressurestat provides and at 8 to 9 bar.
But: If the espresso is right – and that happens quite well with the right routine – then it is indistinguishable blind from what a 10,000-euro machine puts in the cup. That sounds provocative, but it is true. You might make 4 or 5 out of 10 shots exactly on point with the Gaggia Classic. A more expensive machine does 9 out of 10. But the good shots are qualitatively equivalent.
So what distinguishes the Gaggia Classic from a 3,500-euro machine? Not the basic ability, but the consistency. More expensive machines stay focused in the target range and do not fluctuate up and down. Parallel steaming is possible with much more power. And with ten shots in a row, the more expensive machine has nine in the target.
Our recommendation for coffee selection: Stronger roast profiles. The machine is around 91°C when you flush. This puts you in a good target range for espresso with darker roasts. Light specialty espressos, which often require precise temperatures and also frequently need 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
The Gaggia Classic really cleans up here. For heating up plus a double espresso, it only draws 0.067 kWh – of which 0.058 kWh is for heating up and only 0.009 kWh for the shot itself. Typical for a small single-boiler that only has to heat a tiny boiler. 9 out of 10 points, well-deserved.
Interesting: You wait 15 minutes for the machine, but consume hardly any electricity in the process. The heat-up time is long for the small boiler, the energy requirement for it is vanishingly small.
Milk foam & Steam
Score: 4.8/10
Steaming is quite doable, but it requires practice and rhythm. As a single-boiler, the boiler must first heat up to steam temperature after the espresso draw, which takes about 60 seconds. Then you have another 60 seconds for the actual steaming.
First hurdle: condensation. About 8 milliliters come out in the first one to two seconds. That is why purging the steam wand beforehand is mandatory. Then you have solid power at the beginning, which you must absolutely use. The pitcher must be tilted strongly so that the stretching phase and rolling phase happen simultaneously. After 15 to 20 seconds, the power drops. It does pick up slightly again, but that doesn't get you into deep turbulence with larger pitchers.
The result: creamy, pleasant milk foam. Very important: Flush well after steaming and wait one to two minutes before you brew again.
Workflow & Operation
Score: 7.0/10
The Gaggia Classic scores here with simplicity. One button for espresso, one button for steam, two indicator lights. That's it. No menus, no settings, no display: turn on, wait, brew.
The water tank holds over two liters and is easily removable. The drip tray is generous at 600 milliliters. The portafilter locks in cleanly. There is neither volumetrics nor time control. You press the button, the machine brews, you press it again. If you want to work precisely, you need a scale under the cup.
What's missing: there is no cleaning program, no shot timer, no dosage option. Expected for this price range.
Accessories
Score: 4.0/10
Included: portafilter with 2-cup 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 fits flush in the portafilter, but is otherwise more suitable for hanging up your coat. It is once again a tamper made of cheap plastic that takes away the joy of the drink while preparing the espresso. But: It is included, you can get started right away.
Volume
Score: 2/10
69 decibels and thus rather loud. A typical vibration pump, after all. It behaves the way it behaves. Anyone who wants to brew quietly in the morning while the rest of the family is sleeping has a bad hand.
Volume potential / Catering
Score: 0.5/10
The Gaggia Classic cannot do the WBC protocol. 14 shots in quick succession make no sense with this single-boiler. A fixed water connection is not provided and the steam endurance is also missing for continuous use. That is not its area of application.
Practical tips for everyday life
Based on all measurements, here is the optimal workflow:
Heating up: 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 overheated water. When it flows evenly, lock it in and brew.
Between shots: Do not rush. Wait at least 1.5–2 minutes. Unlock, flush briefly for 1–2 seconds, then go to the grinder, prepare coffee, tamp – this way, the 45–90 seconds pass almost by themselves.
Coffee selection: Stronger roast profiles. The machine is around 91°C – that is perfect for darker roasts. Light specialty roasts are not its strength.
Steaming: After steaming, flush well and stabilize the temperature again and wait one to two minutes until the next espresso. The boiler must recover from steam 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 must give the construct stability. In the single-dosing area, there are very good options for 250–300 euros.
Conclusion: Honest, compact – and good with method
Total score: 4.8/10 – Compromise | Price-Performance: 7.0/10
The Gaggia Classic E24 achieves 4.8 out of 10 points in our test and thus lands in the "Compromise" quality class. Without the right method, this machine simply does not deliver convincing results.
But that is exactly 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 economical (9/10 for electricity), more compact than almost any other, solidly built for its price, and the operation could not be simpler.
Most importantly: the basic technology of the machine 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 the machine for? For beginners who are ready to engage with the topic. Who want to find their rhythm with the machine. Who understand that flushing is not an option, but a duty, and who provide a solid grinder.
The espresso you get out of 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 guides in the future, because the Gaggia Classic is one of the best platforms to upgrade step by step.
You have to get to know each other, find your rhythm. And that is perhaps even the exciting part about it.
Technical data at a glance
| Feature | 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) |
| Brew 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 | Vibration pump |
| Dimensions (W×D×H) | 21 × 26 × 36 cm |
| Volume | 69 dB(A) |
| Features | Pressurestat, no PID, no offset, no profiling |
Gaggia Classic Evo Pro E24
Test report summary, protocol 2.3 (January 2026)🛠️ Recommended specialist partner for the Gaggia Classic E24
Germany: Stoll Espresso
We recommend specialist partners who we know offer good work and reliable service. When ordering via our commission links, you don't pay any more, but we receive a small amount of support – which we invest directly into new test equipment.
All measurements performed according to the Kaffeemacher test protocol v2.3. Temperature measurement with Scace 2, power measurement with Christ CLM1000 Professional. Evaluation based on the 3-cluster scoring model.
