Steane Klose | Apr 23, 2008

According to the folks over at Bimmerfile, BMW are getting set to inject some turbocharged V8 fun into the 5-series range. In preparation for the event, BMW began trademarking the 555i name last year which had some believing that a 5.5-litre V8 was on the way but that’s not believed to be the case.

A more likely scenario is the fitment of BMW’s new N63, 4.4-litre twin-turbo, direct injected mill, the same engine being released in the X6 ‘50’. With 298Kw/400hp and a hefty 610Nm the force fed V8 promises to bring a new sparkle to the aging 5-Series line-up. Good for a 0-100km/h time of 5.4 seconds in the X6, wrapped in the lighter 5-Series shell it should be a rival for the M5...

bmw-n63-twin-turbo-v8-tmr-1

The N63 is an interesting engine in that it houses the two turbos within the ‘V’ of the engine and relegates the inlet manifolds to the sides of the block - its also known as a reverse-flow engine. In this configuration the twin-turbocharged V8 remains a relatively compact package.

A notable feature is the air-to-water intercoolers which are more efficient than the more common air-to-air type. BMW’s Valvetronic system, a feature of their atmo engines is not fitted to the N63 or the 335i’s turbo-charged in-line six-cylinder. While transmission choices have not been officially announced, Bimmerfile suggest that a ‘milder’ DCT transmission will be available.

The 555i is expected to offer the same features available in the rest of 5-Series line-up including a sport package that will see the fitment of an aerodynamic body kit and the choice of some unique exterior colours.

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Filed under BMW v8 News turbo prestige 555i 8cyl