Difference Between early and late M20 engine

Post Mon Apr 25, 2005 8:41 pm

What are the differences between the M20 325 engines found in the phase 1 and phase 2 cars ?

Jake.

Post Mon Apr 25, 2005 8:52 pm

Hi Jake,

The compression ratio is different:

Pre facelift = 10.2:1
Post facelift = 9.5:1

....which basically means pre-facelift M20s are faster

Post Mon Apr 25, 2005 11:18 pm

the fuel system is different too, pre f/l is a k jetronic and post f/l is called a motronic unit

Post Mon Apr 25, 2005 11:44 pm

johnono wrote:the fuel system is different too, pre f/l is a k jetronic and post f/l is called a motronic unit

AFAIK, only the 320i / 323i got jetronic, all 325i's came with motronic

Facelifts 325i's just got an update of the motronic system.

Post Mon Apr 25, 2005 11:48 pm

aaah

nice one ziggy, i never knew