About BMW S55 engine

BMW carried the scaling back example to its energetic M models in 2014 with the in-line six-chamber bi-super S55 engine from the M division. It was a remarkable accomplishment for the class because the S55 is the first turbocharged engine in the motor of a BMW M vehicle.

In the past age of the M3, BMW really relied upon an S65 typically suctioned V8 engine. Regardless of the more modest chamber numbers, the change from typically suctioned motors to turbocharging came bearing elevating news for fans. Drive is stretched out from 414 to 425 hp (309 to 317 kW), and the power went up from 295 to 406 lb/ft (400 to 550 Nm). Here is the start and end you truly need to know about BMW’s S55 engine. Here in this article, we will examine all the BMW s55 motors and best utilized BMW s55 motors accessible in the USA.

What Makes the S55 Engine novel?

The S55 is depicted by a high steady power normal of a super, which is available in a wide reach from 1850 rpm to 5500 rpm. The ideal show band comes in from 5500 rpm to 7300 rpm and the most outrageous speed can be cultivated at 7600 rpm. The engine offers the best of two universes: super and quick.

Aficionado M vehicle fans who understand the chronicled background of these vehicles were reliably doubtful about turbocharged motors. In light of everything, the most flawlessly awesome M vehicles were developed NA, which was their most prominent strength. In any case, when BMW announced a twin super I6 engine for the promising period of M-vehicles, the fans understood the conceivable up-sides of such a move. Dissimilar to the N55, the BMW S55 features a shut deck engine square and crankcase setup, making it extreme to the higher chamber pressures connected with the inclined up yield.

The drag X stroke is to some degree under the square, at 84mm X 89mm. The more expanded stroke helps the S55 with achieving shocking low-end power, with top grunt available from well under 2,000rpm. The top draw continues straight quite far past 7,000rpm.

Which Cars Have the S55 Engine?

BMW has used various employments of the S55 engine on different M models throughout the years starting around 2014.

You can find the once-over under:


2020-present F87 M2 CS Racing (275 hp – 360 hp)

2019-2021 F87 M2 Competition (405 hp)

2020-2021 F87 M2 CS Racing (444 hp)


2014-2018 F80 M3 (425 hp)

2016-2018 F80 M3 Competition (444 hp)

2018 F80 M3 CS Racing (453 hp)


2014-2020 F82 – F83 M4 (425 hp)

2016-2020 F82 – F83 M4 Competition (444 hp)

2017-2020 F82 M4 CS Racing (453 hp)

2015-2016 F82 M4 GTS (493 hp with water implantation structure)

2017 F82 M4 DTM Champion Edition (493 hp with water implantation structure)

BMW S55 Engine Specs

Stock Power: 425hp/406tq (different variations have some place in the scope of 405hp-493hp)

World Record HP: 1,150whp (approx. 1,350 wrench hp)

Evacuation: 2,979cc (2.979L)

Turbocharger: Twin “single-scroll” turbos

Pressure: 10.2 to 1

Bore x Stroke: 84.0mm (~3.31″) x 89.6mm (~3.53″)

Internals: fabricated steel driving bar, delivered aluminum compound chambers, and rings

Block Design: Closed-deck

Redline: 7,500 rpm

Injectors: Bosch solenoid style direct injectors

Which one is better: N55 or S55?

The S55 moreover incorporates a magnesium oil skillet with is 1000 grams or 2.2lbs lighter than the N55’s aluminum oil compartment.

 the critical changes between the N55 and S55 are the S55’s closed deck block, more grounded chambers, sodium-filled exhaust valves, twofold chamber high-pressure fuel siphon, the twin-super structure appeared differently in relation to a solitary super system, and upgraded intercooling structure.

 The S55 uses 75% of comparative parts as the N55, so they’re amazingly similar.

The S55 essentially has a little pack of modifications that grant it to reliably convey more power and be ready for track use. To the degree which one is better, I accept it’s truly clear what the answer for that question is. The S55 is just an upgraded N55, there are really no disadvantages to it.

Final verdict

Like any excess engines made by BMW, the S55 works best with real or OEM quality parts. It’s a known truth that it might be subtle the right parts according to your engine’s subtleties in case you’re not a specialist trained professional. We have the best used BMW motors for your vehicle. Every one of our motors has a warranty and are tried prior to dispatching. Autotechio has been the best Authorized vendor managing in the USA for quite a long time.

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