The launch of the BMW 5 Series GT also coincides with the introduction of a new BMW engine, internal codename: N55. The new BMW TwinPower Turbo uses a single twin scroll turbo instead of twin turbochargers as the N54 engine. The 2,979cc six-cylinder powerplant features for the first time High Precision Injection and variable VALVETRONIC valve management combined with the single twin-scroll turbocharger.
Even though BMW has not yet confirmed our suspicions, we believe the single turbocharger used in the 5 Series GT is the same as those fitted to the new 4.4 liter V8 engine in the X5M/X6M. Power and torque is similar to the twin turbo engine - 225 kW/306 hp at a speed of 5,800 rpm- but the 400Nm/295 lb-ft peak torque kicks in 1,000 rpm earlier at 1,200 rpm.
N54 Engine Featured Here
Compared to the BMW turbo engine already well-known in the 335i, 535i and other models, the N55 engine offers even greater fuel economy combined with optimized CO2 management. The power unit of the BMW 535i Gran Turismo is the first turbocharged engine to feature a map-controlled oil pump which, taking up less energy, makes a further contribution to motoring efficiency.
We’ve also done some snooping around and asked some people, and the rumor is that in the near future, BMW will offer a twin-turbo engine with VALVETRONIC and Direct-Injection, which might produce close to 360 horsepower. Since we can’t confirm it 100%, take this with a grain of salt, but we’ll let you know as soon as we hear more.
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