All the new 6-cylinder models are powered by BMW’s advanced N52 engine, which is
also making its debut in the new 3 Series. The new Sports Wagon, an appealing
concept combining 5 Series sophistication with enhanced load-carrying
versatility, appears in a single all-wheel-drive model.
All-New 6-Cylinder
Engines
These days, most 6-cylinder engines are V-6s. By contrast, BMW’s “sixes” are
inline engines, noted not only for their layout, but also for exceptional
smoothness and unique sound. BMW customers and independent critics treasure them
for these attributes, and BMW has retained the inline-6 layout while developing
it toward reduced weight, more compact dimensions and even more brilliant
performance, smoothness and sound. Confirming all this, AutoWeek‘s February 28,
2006 issue noted (in the context of the new 3 Series) that the new engine
“sounds great, with an emphasis on clean mechanical noise from the engine bay
rather than the tone of the muffler.“ BMW’s new generation of 6-cylinder engines
is designated N52.
Valvetronic variable valve lift. This patented innovation, already
enhancing the performance and fuel efficiency of BMW’s V-8 and V-12 engines, now
appears in a BMW 6-cylinder engine as well – and in evolved form. Valvetronic
varies valve lift to a far greater degree than other variable-lift systems – so
much, in fact, that it replaces the traditional engine throttle. Engine
breathing is controlled entirely by the valves themselves. ...BMW 530i Sedan: Page 2