Hello All,

What does the 'J' in JTD stand for, never see it mentioned??

jiohnnyp

We thought it was Jet, and something mentioned Jarrett - but to be honest, it probably stands for nothing - there is no J in the Italian language that would fit, so probably down to marketing.

This has come up a few times before.

It's Jet, as in 'high-pressure jet' in a common rail engine. It's a case of Fiat using the English word as it suited.

Volkswagen own the copywrite on 'TDI', therefore everyone has had to use their own moniker for it.

So you have HDI, JTD, multijet, TDCi, CDTi, CDi, CRD, D4 etc. etc.

Just found the earlier thread about this - same old posts, lol

https://www.fiatforum.com/showthread.php?t=38533