2007-01-15 18:56:21 · 9 answers · asked by jay jay 1 in Cars & Transportation ➔ Car Makes ➔ Volkswagen
Do you mean a TDI? It stands for turbo diesel intercooled. Intercooled, in case you aren't familiar with the term is a system to supply the turbo with cold air to make even more power. And BTW I assumed that since this question was posted under VW that you were talking about VW's.
2007-01-15 19:05:17 · answer #1 · answered by tucsondude 4 · 1⤊ 1⤋
CDi is a Mercedes 'thing', it stands for "Common-rail Direct Injection".
"Tim S" is correct, these days most diesel-powered cars come with Turbo-Chargers. In Merecedes-Benz (and I don't know how many others), its even a "Variable-Geometry, Turbo-Charger". This means that the Turbo-Charging system is designed to extract as much power from the flowing exhaust gases no matter how slow or fast the gases flow, and make useful torque out of it to enhance the car's acceleration and top speed, while keeping the fuel burn to the bearest minimum. Its almost like another "gearbox" but for the turbo-charger when it picks up mechanical effort from the flowing gases...much like a windmill in a strong breeze...used for grinding grains or providing water circulation or even electricity. Bottomline, its highly efficient compared to the older turbo systems.
The intersting thing in the "Variable-Geometry" type is that the Turbo-Charger extracts power all the time; wether the engine is cranking at low revs (as low as 1000 rpm) or at high revs as high as 4,000rpm or more). Older Turbo-Chargers could only extract power when the engine was cranking at mid-range (around 2,500rpm or so). I think this shortcoming is what those auto experts call "Turbo Lag"...when you have to wait (while you're accelerating) for the revs -and exhaust gas flow- to build up to the point where the Turbo "kicks in" with the extra "oooooomph".
2007-01-16 00:03:54 · answer #2 · answered by Fulani Filot 3 · 1⤊ 0⤋
Mercedes use the initials CDi for all their diesel powered cars. They are bound to have turbos these days, very few diesel cars don't these days. I don't know what the c stand for and the i generally refers to fuel injection but you can be sure that a Mercedes CDi will be a pretty powerful turbo diesel
2007-01-15 20:14:12 · answer #3 · answered by The Mad cyclist 4 · 0⤊ 0⤋
A CDi is a vauxhall diesel engine without the turbo.
2007-01-18 10:00:30 · answer #4 · answered by Mr Anonymous 1 · 0⤊ 0⤋
VWs don't have a CDi
They have a non turbo diesel SDi and a turbo diesel TDi
Renaults have a DCi, but I can't find a manufacturer who sell a CDi. There's plenty of CTDis out there but no CDis.
Are you sure you've got the initials correct?
2007-01-15 19:47:01 · answer #5 · answered by wally_zebon 5 · 0⤊ 1⤋
like the person before me--if you mean TDI--yes, that is the purpose for having an intercooler. You cool down the charge air from the turbo threw a air/air intercooler. roughly a radiator that the charge air flows threw--as the air on the outside passes threw the exterior core of to cool down the air.
2007-01-15 19:37:01 · answer #6 · answered by redrepair 5 · 0⤊ 1⤋
I think you mean diesel TDI. and the T would stand for turbo.
2007-01-17 14:14:41 · answer #7 · answered by ButwhatdoIno? 6 · 0⤊ 0⤋
TDI stands for turbo direct injection. not turbo diesel intercooled.
2007-01-16 14:50:59 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Do you mean a TDI?
2007-01-19 09:11:59 · answer #9 · answered by jerry 7 · 0⤊ 0⤋