This new powerplant also features increased low-down torque (maximum 410Nm at 1,500rpm), and and improved top speed and 0-62mph.
And the boosted performance is not at the expense of economy. Fuel consumption goes up from 35.3mpg to 36.7mpg.
The new engine will come with a new six speed manual transmission.
The coupe's styling has also been tweaked in line with the recent changes to the saloon and touring models last year. This will comprise a smoother bonnet and a distinctive new front spoiler punctuated with a new wider boot grab handle.
Prices for the 330Cd and other new 3 Series models – the convertibles and compacts – will be announced early in 2003.