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Old 11th August 2010, 10:38
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Default M20 Engine Info and advice

Hi All

I am considering changing the engine in my Marlin Hunter (think cabrio) to an M20 2.5, which I know many on here have used.

Is there any significant differences and advantages between the early or late engines. I know the injection changed from jetronic to motronic which I believe was to allow closed lambada control with a CAT but should I be looking for one in favor of the other.

The car was registered in 97 as new (factory built) and has been running a ford engine with cat which met 97 emission regs. I will need to prove the age of the new engine at MOT so emissions are tested as per the engine I use.

Regardless of the year of the M20 I can't see any emission issues at MOT providing I can prove engine age.

Makes me wonder if the earlier engine is the better bet to avoid having to use a cat, but do I lose out there with an inferior early injection system or are there other differences between the early/late engine which would/should influence the choice.

Sorry for the ramble, any info gratefully received.

John
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