What is the displacement of the N55 engine?

3 Answers
BarrettLee
07/23/25 10:59pm
The displacement of the N55 engine is 3.0 liters, which is a 3.0-liter inline six-cylinder turbocharged engine with relatively strong power. Composition of the N55 engine: The N55 engine housing consists of the engine block, cylinder head, cylinder head cover, oil pan, and seals. The block is made of die-cast aluminum alloy, comprising the crankcase and base plate. Advantages of the N55 engine: The cylinder head of the N55 engine is a newly developed product. For the first time in a BMW six-cylinder engine, it features direct injection, an exhaust turbocharging system, and Valvetronic. The cylinder head has a compact structure and is equipped with the third-generation Valvetronic. The combination of the exhaust turbocharger, Valvetronic, and direct injection is referred to as Turbocharged Valvetronic Direct Injection, which reduces CO2 emissions or fuel consumption by 3-6 percentage points. Models equipped with the N55 engine: The N55 engine is used in various BMW models such as the 135i, 335i, 535i, 640i, 740i, and Z4. This engine has also been introduced into the domestic market and can be found in imported 335i and domestically produced 535i models in the current Chinese market.
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LeahMarie
08/10/25 6:45pm
As an ordinary car owner with years of driving experience, I remember the BMW N55 engine has a displacement of 3.0 liters, which was used in my previous car. It ran very smoothly, and the fuel consumption was acceptable during city cruising, around 10 liters or so. On the highway, it had plenty of power, making overtaking easy and enjoyable, thanks to its turbocharged design that delivers strong torque at low RPMs. However, maintenance requires attention, with regular oil changes to avoid carbon buildup. I usually check the fuel system myself, saving a lot of trouble. Compared to older engines, the N55 is quieter and more efficient, used in both the BMW 3 Series and 5 Series, with good durability. Overall, the 3.0-liter displacement is quite balanced, meeting performance needs without being too costly, and I highly recommend it to those who enjoy driving pleasure.
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OCarson
09/23/25 7:08am
I'm a bit obsessed with automotive technology. The BMW N55 engine has a displacement of exactly 3.0 liters, which converts to approximately 2979cc. This engine is a turbocharged inline-six cylinder with a maximum output of 306 horsepower, commonly found in models like the 3 Series GT and X3. I've studied its advantages: it features twin-scroll turbocharging and variable valve timing, which enhance responsiveness and provide smooth, linear acceleration. However, it also has some drawbacks, such as potentially higher oil consumption requiring regular maintenance. I've done some DIY modifications myself, like installing an aftermarket intake system for a modest performance boost. From a technical perspective, the 3.0-liter displacement offers excellent efficiency in the mass market, making it one of BMW's classic masterpieces.
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