BMW has introduced three new six-cylinder power plants into its Three Series range, writes Don Booker.
The most popular model in the BMW portfolio now encompasses a new twin-turbo 3-litre petrol engine to be badged 335i, and a single turbocharged diesel engine called the 335d.
Joining these new units is the most powerful diesel ever to power the marque in the UK, a twin-turbocharged 2,993cc engine with 286bhp.
