I'm sure you can find this information by speaking to a dealership. There are no diesel or four cylinder 1 series cars in the US, so most of us just don't know, but I'm pretty certain that the diesel engine will out perform a similar sized petroleum engine in both torque output and fuel efficiency.
Originally Posted by tazzie
Hi, i own a 120d 2007 manual 1 series. is a great car but i am thinking of changing it for either 118i SE automatic petrol 2009 or a 118d SE 2010. Which is the better car for performance and economy. i do not do many miles
Current - 2012 135is DCT
2009 Mini Cooper S 6 Spd
2006 M Roadster
2004 645i SMG
2002 330i 5 Spd
A bunch of cars not worth mentioning...