
We thought we'd seen the last of the little 1.4L MultiAir engine from Fiat Powertrain Technologies (FPT)... until the Facebook page "Multiair Tuning & Developments - MTD" set the record straight. With 532 hp and 600 Nm of torque, this Alfa Romeo Mito pushes the limits of the MultiAir engine like never before. An unofficial world record, but an impressive one!
Record-breaking hunt for the 1.4L
After a break of several years, the MTD team set about exploring the mechanical limits of the famous 1.4 MultiAir. Their aim: to beat their own record and answer certain technical questions (notably the Magneti Marelli ECU).
And the gamble paid off. Thanks to a boost pressure of 3 bar, again with the original Magneti Marelli 8GMF ECU, the Mito shattered the counters on the Dynojet test bench.
The measurements were taken in 5th gear, as 4th gear caused the wheels to spin on the dyno. This generated around 2 to 5 % of additional losses. By cross-referencing these losses with the Dynojet data (12 to 14 % of transmission losses on front-wheel drive), MTD arrived at the following figures:
- Estimated minimum power: 532 hp
- Estimated maximum power: 565 hp
- Conservative value: 532 hp
- Estimated torque: 598 Nm and 627 Nm
Engine preparation details

Here are the main elements of this engine tuner:
- Turbo: Borg Warner EFR
- Manifold: custom twin-scroll
- Camshafts: modified for twin-scroll operation
- Intake: solid-cut aluminum manifold
- Lower motor: fully forged
- Cylinder head: prepared, with Stage 5 mapping
- Fuel: 100 RON + methanol injection
This project is not (yet) aimed at straight-line or track performance. The aim is to explore the technical limits of the 1.4 MultiAir. The Mito's original chassis is currently unable to exploit this level of power. A new transmission and chassis redesign will be considered once the engine preparation phase is complete.
The world's most powerful Alfa Romeo Mito?
This Alfa Romeo Mito is now the most powerful car in the world equipped with a MultiAir engine. And even if this record will never be homologated, it confirms one thing: the little Italian engine still has a bright future ahead of it, in the hands of enthusiasts capable of sublimating it.
Once again, we see that Alfa Romeo didn't need stellantis' shit to think.
It's great to know that the engine in my little Mito QV can handle that!
MTD best MultiAir tuners
Naja, ohne spezielle Maßnahmen hält diese Leistung kein Tjet Motor das aus.
Serie ist halt doch was Anderes, sieht man auch an den getunten Tjet Abarth Motoren, die knapp an die 200PS Grenze gehen. Raus aus den schubladen mit den Fiat/Alfa/Lancia Motoren aber auch Opel. Egal, ob Benziner oder Diesel, allesamt besser, als das, was stellantis in den letzten Jahren geschafft hat.