ECM Mechanika Slim PID vs La Pavoni Cellini Evo PID

Technical comparison · Heat exchanger

In brief

Both machines share a heat exchanger boiler and sit in a similar price range: what changes day to day is the water tank. Anyone pulling several shots back to back without stopping to refill gets more room from the larger one; anyone who needs less autonomy won't notice the difference.

Parameter
ECM Mechanika Slim PID Mechanika Slim PID ECM F4 · Semi-professional
La Pavoni Cellini Evo PID Cellini Evo PID La Pavoni F4 · Semi-professional
Identity
Use tier F4 — Semi-professional F4 — Semi-professional
Price
Price (€) ~1000–2200 € ~1000–2200 €
Price updated on 09/2026 09/2026
Universal specs
Dimensions (W×D×H) (cm) 25 × 44.5 × 39.5 cm 29.5 × 43 × 37 cm
Weight (kg) 20.2 kg 24.7 kg
Power (W) 1500 W 1520 W
Voltage (V) 230 V 220 V
Category specs
Boiler architecture Heat exchanger (HX) Heat exchanger (HX)
Portafilter diameter (mm) — 58 mm mm
PID control Yes Yes
Pump type Vibration Rotary
Group head type Proprietary E61
Boiler material Stainless steel Copper
Water tank capacity (l) 2.8 l 1.7 l
Steam wand — Manual steam wand
Plumbable — Yes
Pressure gauge Yes Yes

The differences that matter

  • Tank: 2.8 l (Mechanika Slim PID) vs 1.7 l (Cellini Evo PID) → fewer refills during back-to-back sessions.
  • Group and pump: proprietary group with vibration pump vs E61 group with rotary pump → two different architectures, not a hierarchy.

Which one to choose

Choose Mechanika Slim PID if…

With a 2.8-litre tank, anyone brewing several shots in a row — a morning with guests, or two or three people queuing at the machine — refills less often than with the Cellini Evo PID. The group head is the manufacturer's own design and the pump is vibration-type: choosing this machine means accepting that architecture instead of the E61 group with rotary pump on the other.

See the Mechanika Slim PID sheet →

Choose Cellini Evo PID if…

With a 1.7-litre tank, the Cellini Evo PID needs more frequent refills during a long run of shots. In exchange it comes with an E61 group, a rotary pump and a copper boiler, instead of the proprietary group and vibration pump on the Mechanika Slim PID.

See the Cellini Evo PID sheet →

Where to buy

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