Yesterday at work a few of us got talking about cars and TDi came into the conversation. They said that TDI means turbo diesel injection, I said turbo diesel intercooler as all diesels are injection so it would be pointless putting it as an i. Who is correct?

Depends who made it.

Generally, and normally on VAGs, it's turbo diesel intercooler/intercooled.

Although it can be Turbo direct injection, normally on a transit or a landy.

Neither, it stands for Turbocharged Direct Injection (assuming VW group)

http://www.volkswagen.co.uk/technology/diesel/tdi

Edited 12 September, 201510 yr by 0wl

I had a CDTi, what's that?

 

Much better when I had a simple TD engine.

Common rail Diesel Turbo Injection (assuming Vauxhall).

These are all just marketing terms though for essentially the same thing. Nowadays VW's TDI car engines are common rail too.

Edited 12 September, 201510 yr by 0wl

long ago you could tell the power levels of the car depending which part of " Tdi " was coloured red

I always thought it was Turbo Diesel Injection, but looking it up on Google the D stands for Direct. Which is odd because you never see TDI on a petrol car. 

You do get much the same though.  

eg  you get the likes of  a 'GDI'  Gasoline Direct Injection'

Having driven TDi and TSi variants of the same car, I reckon TDi means:

 

Rough and Loud

If it's a 3-pot, I'll agree, I've driven smoother tractors.

Camelspyder have you driven a decent diesel ? Looking at your car history the only one's a Proton. No wonder you think that.

The Proton was a f*** sight smoother than the VW 1.6TDi  I rejected when choosing to buy the Toledo/Rapid

 

I drove the '01 Proton back to back with the '13 Toledo Tdi around the SEAT test drive route and the old engine was smoother and quieter - and the Proton rode no worse than the newer car.

 

The '92 AX 14D I did 130000 miles in smashed the 20 year newer VW product on both ride and engine NVH.

 

 

So to answer, yes I have driven 2 decent diesels a long way - one by PSA and one by Mitsubishi.

 

Not to mention an Ecoflex Astra diesel which appeared not to use any fuel over a 300 mile trip.

 

So the VW is for me possibly the worst diesel I've tried.

Edited 12 September, 201510 yr by camelspyyder

Having driven TDi and TSi variants of the same car, I reckon TDi means:

Rough and Loud

Youve not even bothered to use the letters T, D or I in that.

Poor effort sir

The Proton was a f*** sight smoother than the VW 1.6TDi I rejected when choosing to buy the Toledo/Rapid

I drove the '01 Proton back to back with the '13 Toledo Tdi around the SEAT test drive route and the old engine was smoother and quieter - and the Proton rode no worse than the newer car.

The '92 AX 14D I did 130000 miles in smashed the 20 year newer VW product on both ride and engine NVH.

So to answer, yes I have driven 2 decent diesels a long way - one by PSA and one by Mitsubishi.

Not to mention an Ecoflex Astra diesel which appeared not to use any fuel over a 300 mile trip.

So the VW is for me possibly the worst diesel I've tried.

The 1.6 isnt the best engine.

Try a 2.0CR. theyre nice. But obviously you have to let a diesel warm up, otherwise theyre all rattley

As I parked in a supermarket i was admiring a really nice looking Audi A1 Sportbaback on a 65 Plate, smart wheels and body kit, 

and then the driver started it and i have heard a more pleasant Massey Ferguson than the racket from that diesel engine car.

It is the same when Driving Instructor with Diesel MINIs stop outside my house, what a terrible noise to have with modern cars in urban environments.

 

IMO Commercial Vehicles with Diesel Engines do not sound as loud or as intrusive as these small passenger cars

with engines totally inappropriate to the vehicle they are in.

The 1.6 isnt the best engine.

Try a 2.0CR. theyre nice. But obviously you have to let a diesel warm up, otherwise theyre all rattley

 

Like I said - I've driven Citroen and Mitsubishi diesels for many years.  

 

I can tell the difference - especially when I get out of a £17000 VAG product into my £480 Proton and there is a clear improvement in smoothness.  It didn't motivate me to buy a new one I can tell you.  :|

Edited 13 September, 201510 yr by camelspyyder

Like I said - I've driven Citroen and Mitsubishi diesels for many years.

I can tell the difference - especially when I get out of a £17000 VAG product into my £480 Proton and there is a clear improvement in smoothness. It didn't motivate me to buy a new one I can tell you. :|

I can imagine it didnt.

Petrols the way forward anyway

Agreed, I love my little TSi.

And I forgot we've done 150k on a Fiat Multijet as well - thats as nasty as the VW oil burner.

Don't know how I forgot that, must have wiped it from my memory.

Edited 13 September, 201510 yr by camelspyyder

I always thought it was Turbo Diesel Injection, but looking it up on Google the D stands for Direct. Which is odd because you never see TDI on a petrol car. 

 

A lot of people use to think that, especially when you could buy a TD. However ALL diesels are injected, that's how they work and how Rodolf (and Herbert Akroyd Stuart before him) designed them!

 

TDI is Turbodiesal Direct Injection. TD (used to be) Turbo Diesel with in-direct injection where fuel is added to a pre-combustion chamber in the cylinder head. Direct injection has fuel directly injected into the cylinder head. A simple D was non-turbo old diesel.

 

However nowadays on modern cars, D or td are Turbo diesels with direct injection.

Direct injection petrol often doesn't sound nice. TFSI stock sounded pretty rubbish.

 

Recently I saw and heard a tech driving a Jag F Type from from forecourt to the workshop at the back. On any throttle at all it sounded great. Off the throttle it sounded like a bag of spanners, really bad.

Direct injection petrol often doesn't sound nice. TFSI stock sounded pretty rubbish.

Recently I saw and heard a tech driving a Jag F Type from from forecourt to the workshop at the back. On any throttle at all it sounded great. Off the throttle it sounded like a bag of spanners, really bad.

Why would you ever come off the throttle if you had one of those?

I always thought it was Turbo Diesel Injection, but looking it up on Google the D stands for Direct. Which is odd because you never see TDI on a petrol car. 

At a guess, because most octane engines use indirect (port or plenum chamber) injection rather than direct injection to the cylinders or to a swirl pot in the cylinders?

long ago you could tell the power levels of the car depending which part of " Tdi " was coloured red

 

They still make chrome, then chrome & red TDI & TSI lettering. I know that the 122/125PS petrol engine get red "I" & The 140/150PS get red "S" & "I" because mine would have had red S&I

 

Linky to the rear labels for MK07 Golf

 

http://www.partsbase.org/vw/golf-variant-4motion-golf-eu-2013-golf-au-d-000-001-85350-inscriptions-lettering/