BMW 520d: Range stalwart gains revised engine to cut emissions and raise power

摘要

THE BMW 5-SERIES is probably the finest company car that money can buy. It has been at the top of its game for years, making it a prime target for rivals in the hard-fought executive saloon class. Audi fired a shot across the 5-series' bows when it introduced its new range of Ultra diesel engines in the A6 a few months ago. They were smoother, more efficient and, in most cases, cheaper than the equivalent four-pot engines in the 5-series.