BMW unveils single turbo N55 six-cylinder engine for new 5-series GT


The N55 is the world’s first engine to combine turbocharging, direct fuel injection and Valvetronic technology

The N55 is the world’s first engine to combine turbocharging, direct fuel injection and Valvetronic technology

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BMW’s current N54 series straight-six engine is one of the most praised engines in the industry today, having taken out the coveted International Engine of the Year award last year and appearing in a vast array of BMW models. With the unveiling of the new 5-series GT last week, BMW has announced a new variation of the 3.0L engine which will debut in the crossover at the end of the year.

The N54 features a twin-turbocharging system, as well as direct-fuel injection and BMW’s own Valvetronic technology, and in its most potent configuration develops up to 326hp (243kW) at 5,800rpm and 332lb-ft (450Nm) of torque from as low as 1,500rpm. BMW’s new variation on the engine, labeled the N55, is based on the same basic engine block and valve system but only sports a single turbocharger. It is the world’s first engine to combine turbocharging, direct fuel injection and fully variable Valvetronic valve management developed by BMW.

Peak output is still a healthy 306hp (225kW) at 5,800rpm and 295lb-ft (400Nm) of torque from an even lower 1,200rpm. Furthermore, the new N55 is also said to be more fuel-efficient than the N54 though no independent test results have been produced.

As previously mentioned, the N55 engine will debut in the 535i 5-series GT along with an eight-speed automatic transmission. This model will be able to accelerate from 0-100km/h in around 6.3 seconds and is rated at 26mpg (9L/100km) in fuel economy.
 
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