Hdi Vs TDI

godtabh

Whats the difference between HDi and TDI as and example C4 1.6HDI and Golf 1.9 TDI.

Had rented the two cars recently.

Just handed back the C4 today and got 620km for half a tank of diesel. Cant remember what the Golf got but was no where near that range.

corkcomp

godtabh wrote: »

Whats the difference between HDi and TDI as and example C4 1.6HDI and Golf 1.9 TDI.

Had rented the two cars recently.

Just handed back the C4 today and got 620km for half a tank of diesel. Cant remember what the Golf got but was no where near that range.

it depends on how old the TDI is but most of older VW TDI's are just straight turbo diesel engine i.e. non common rail.. the HDI is a common rail engine

bazz26

The HDI is a 16 valve common rail unit with either 90 or 110bhp. The TDi is an 8 valve PD (pre common rail) unit with 105bhp and has been around since the early 1990s.

godtabh

common rail being more efficient? The C4 was brand new. Not sure about the Golf (belgium car)

challengemaster

HDI = High Pressure Direct Injection.
TDI = Turbo Direct Injection

godtabh

Looking to get a new car (08 on wards) and was looking at Golfs, Focus stuff like that. Drove the C4 for a week and was just amazed buy what I was getting out off it

L1011

godtabh wrote: »

common rail being more efficient? The C4 was brand new. Not sure about the Golf (belgium car)

More efficient and generally less rattly/clattery/tractor like than older diesels

I've a C4 1.6HDI outside and you'd think it was a petrol... when you've the door closed. Power output, time to start from key being turned (even when it was -12C), etc.

Still sounds rather like an industrial unit from the outside, but I rarely hear that!

godtabh

MYOB wrote: »

More efficient and generally less rattly/clattery/tractor like than older diesels

I've a C4 1.6HDI outside and you'd think it was a petrol... when you've the door closed. Power output, time to start from key being turned (even when it was -12C), etc.

Still sounds rather like an industrial unit from the outside, but I rarely hear that!

Not sure if I 100% agree with you there about the sound but compared to an old corolla my dad had years ago its like they reinvented the wheel!

Divorce Referendum

godtabh wrote: »

Whats the difference between HDi and TDI as and example C4 1.6HDI and Golf 1.9 TDI.

Had rented the two cars recently.

Just handed back the C4 today and got 620km for half a tank of diesel. Cant remember what the Golf got but was no where near that range.

Wow thats impressive. My focus has the same engine and I wouldnt get as good as that.

C0N0R

The first "half" of the tank is always bigger than the second half!

godtabh

Divorce Referendum wrote: »

Wow thats impressive. My focus has the same engine and I wouldnt get as good as that.

it most motorway but a decent bit of urban

sentient_6

Would it be correct to say that it all basically means common rail today? & that every company buys the same tecnology & badges it differently? I.e HDI is TDI is CRDi etc etc. Thats a question now cos i'm actually just going by this:

http://en.wikipedia.org/wiki/CRDi#Common_rail_today

alias no.9

bazz26 wrote: »

The HDI is a 16 valve common rail unit with either 90 or 110bhp. The TDi is an 8 valve PD (pre common rail) unit with 105bhp and has been around since the early 1990s.

The TDI moniker covers the whole range of direct injection turbodiesels. Early ones had conventional Bosch VE injector pumps also used on indirect injection diesels. Pumpe Duse came along in the late 1990's and was VW's response to Common Rail with much higher injection pressures than the VE. Eventually, VW did what pretty all other manufacturers did nearly a decade previous and went common rail.

Matt Simis

sentient_6 wrote: »

http://en.wikipedia.org/wiki/CRDi#Common_rail_today

Also mentions a little known fact for pub talk:

The first passenger car that used the common rail system was the 1997 model Alfa Romeo 156 1.9 JTD,[4] and later on that same year Mercedes-Benz C 220 CDI.

This was extensively prototyped in the 1990s with collaboration between Magneti Marelli, Centro Ricerche Fiat and Elasis. After research and development by the Fiat Group, the design was acquired by the German company Robert Bosch GmbH for completion of development and refinement for mass-production. In hindsight the sale appeared to be a tactical error for Fiat as the new technology proved to be highly profitable. The company had little choice but to sell, however, as it was in a poor financial state at the time and lacked the resources to complete development on its own.

Ricardo G

My old man has a 110bhp Hdi Xantia 99 reg and i have to say what an engine, drove it from Dungarvan to Finglas and back last week on just under half a tank, great power, extremely quiet and a miser on Juice. He is getting 740 miles from a fill !!!!!!! And the car has 171k miles on it at the mo

Stinicker

I recently drove a 2.0 Diesel VW Jetta DSG Auto box in Australia and was returning 1,200kms to a tank. I think it was doing somewhere around 60 - 65mpg but one thing for sure it was an absolute miser on juice.

Being automatic and with 4 of us in the car with 7 cases (in its boot) all in we weighed over half a ton I was expecting a hefty fuel bill but it cost only pennies in comparison to petrol cars. The car also had plenty boot to go and was quite nice to drive. Alot of our driving was on open empty highways with cruise control on at a steady 110km/hr but also with the A/c running.

The DSG Auto boxes are far ahead of any manual car in terms of fuel economy and niceness to drive. Autos are the future and I can't wait for more manufacturers to pick up on the DSG box.

Ricardo G

Being automatic and with 4 of us in the car with 7 cases (in its boot) all in we weighed over half a ton

How the hell did ye get seven suit cases into a Vw Jetta lol?

Mycroft H

The 1.6Hdi engine is a fantastic unit, we have it in the C5, really economical, and its refinement is more akin to a pertrol.

On a trip to Galway on the M6 with a bicycle on the roof rack, travelling at 85-110kph we averaged 71.8 miles per gallon on the trip between mullingar and glaway city. Incredibly efficient engine.

Stinicker

Ricardo G wrote: »

Being automatic and with 4 of us in the car with 7 cases (in its boot) all in we weighed over half a ton

How the hell did ye get seven suit cases into a Vw Jetta lol?

It was a ritual every morning like a large jig saw puzzle to get them in and we flimed it until we got them to fit and then just played back the film each time! One of the small ones went in the back seat making a nice boundary between two of the passengers! There was 4 long haul really large cases and 3 full size carryons! We usually needed to get two taxis when going from or to the airport as a result of the baggage.

Stevie Dakota

C0N0R wrote: »

The first "half" of the tank is always bigger than the second half!

You got that right, Recently had a Galaxy 2.0TDCI, the trip computer showed a range of 30 miles, then jumped to 12 miles, then showed 0 miles range, all between Dublin Airport and the N4, had to detour pronto to find juice!