What is the difference between TDI and CRDI in diesel

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What is the difference between TDI and CRDI in diesel engines ? Which is the best ?
2723 day(s) ago by Varun Diesel
Under:   #Engine-related
60
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Answers submitted by Users


Ramakrishnan
Thanks Mr.B.S.Kumar.
 

Posted: 2720 day(s) ago


B S Kumar
Neither of them is a technical acronym - just what has become a common usage. TDI simply stands for TurboDiesel which means there is a turbo charger for added power. CRDI means the injection of fuel takes place from a common rail. Common Rail Diesel Injection - has proved to be more efficient than having separate pipes to injectors. You can very well have a CRDI engine with a turbocharger and each has nothing to do with the other.
 

Posted: 2720 day(s) ago

Hi,
TDI stands doe Turbo diesel and CRDI for common rail diesel injection.CRDI common railing is provided at fuel injection system so that equal distribution of fuel is achieved.In TDI ,swirl is introduced for better distribution of diesel in combustion chamber.CRDI is more efficient than TDI.
 

Posted: 2720 day(s) ago


SwapnilBhalla
losers, its Turbocharged Direct Injection!
 

Posted: 1244 day(s) ago


M M Baig
what dif between TDI and CRDI so please explain me details
 

Posted: 1232 day(s) ago


M M Baig
YES DIESEL ENGINES
 

Posted: 1232 day(s) ago


Manish Rana
tdi stands for turbo direct injection. crdi is for common rail firect injection. TDi is older version of turbo diesel engines while crdi is newer one. better is crdi engine in fuel efficiency and pick up.
 

Posted: 1198 day(s) ago


Manish Rana
don't buy tdi. always opt for crdi engine
 

Posted: 1198 day(s) ago


Praveen
i'm really sorry to say that u r all passing time and wasting the time of other people who are studing ur answers...i m a automobile engg working M&M...people want this type of answer.......TDI and CRDI engine work on the same principle...having a pressure pump to inject the diesel to the engine cylinder through the injectors..the basic difference is that TDI engines have mechanical elements with some ECU sensors to inject the limited quantity of diesel into the cylinder through the injectors but in CRDI engines have almost all sensors like accelerator pedal sensor,crank position sensor,pressure sensor etc which co-ordinate with each other to do the same thing...it reduces the efficiency and unwanted noise,which is causing by the mechanicla elements used in DCI...that's why logan 1.5 creats noise after some usage and not xylo...9503875511..
 

Posted: 1091 day(s) ago


Jayentabhai
Praveen might be u r right, but TDI & CRDI engines are not same. Both r different..jayada shanpatti nahi karne kya...........nhi to ek duga kan ke niche rakh ke kya........
 

Posted: 1086 day(s) ago


Surya
which one is better whether CRDI or TDI??????????????
 

Posted: 1062 day(s) ago


Gopal
Turbo charging of air is done by exhaust driven pump & CRDI is different having its own high pressure pump.
 

Posted: 1053 day(s) ago


JP NAMBIAR
CRDI IS A LATEST FUEL INJECTION SYSTEM TO IMPROVE EFFICIENCY PERFORMANCE WITH THE HELP OF ECU TO SUPPLY DIESEL TO ALL CYLINDERS IN A PROPER AMOUNT.THATS IT.
 

Posted: 1040 day(s) ago


Chirag
crdi engine is give better efficiency than other and smoke,noise etc. are less compare to non-conventional engine,hence crdi engine is preffered rather than non-conventional engine.
 

Posted: 1031 day(s) ago


Jofin A.t.
CRDI Engine is better than TDI Enging
 

Posted: 998 day(s) ago


No
Praveen answer seems right. But it also does not give a clear distinction between TDI, CRDI and Turbo terminology.
 

Posted: 979 day(s) ago


Salinsha
I think the crdi engines are more powerfill than other engine because thats a common rail fuel injucting method because its a sensor injucting that cause the injucting method.go
 

Posted: 977 day(s) ago


Sanjay
which engine is easy for mentanence tdi or crs4 or petrol cng in tata indigo ecs
 

Posted: 972 day(s) ago


Wolf
crdi complicated, you should know the tips of troubleshooting
 

Posted: 943 day(s) ago


Kaushik
Praveen has answared the difference between DCI & CRDI engines not between TDI & CRDI engines.
 

Posted: 943 day(s) ago


Nikhil
sab log gadhe he........CRDI,CRDe,TDi,Multijet sab ek hi technology he. sabhi compnay ke sirf nam hi alag alag he........
 

Posted: 942 day(s) ago


Jacob Ravi
i think the right meaning for TDI is ( turbocharged diesel intercooler) or (turbocharged direct injection) and CRDI is ( common rail diesel injection.)
TDI ENGINE:it has 2 variants VGT(variable geometric turbo) and (non variable) normal TDI engine has a fixed turbine.
The TDI engine uses direct injection,where a fuel injector sprays atomised fuel directly into the main combustion chamber of each cylinder, rather than the pre-combustion chamber prevalent in older diesels which used indirect injection. The engine also uses forced induction by way of a turbocharger to increase the amount of air which is able to enter the engine cylinders,and most TDI engines also feature an intercooler to lower the temperature (and therefore increase the density) of the 'charged', or compressed air from the turbo, thereby increasing the amount of fuel that can be injected and combusted.
(VGTs) slightly different design to avoid turbo lag causing by low speed, usually designed to allow the effective aspect ratio (A:R) of the turbo to be altered as conditions change. This is done because optimum aspect ratio at low engine speeds is very different from that at high engine speeds. If the aspect ratio is too large, the turbo will fail to create boost at low speeds; if the aspect ratio is too small, the turbo will choke the engine at high speeds, leading to high exhaust manifold pressures, high pumping losses, and ultimately lower power output. By altering the geometry of the turbine housing as the engine accelerates, the turbo's aspect ratio can be maintained at its optimum

A CRDi engine has rails that inject the fuel into the engine, which is designed to handle higher pressure than an ordinary diesel engine ÔÇ"thereby having results in fuller combustion and efficiency. Since the development of the diesel engine almost a century ago, the focus has been on increasing the fuel injection pressure.In CRDi, the high fuel injection pressure is generated by a supply pump storing in a reservoir the fuel under high pressure in a central container (rail) and delivering to the individual injection valves (injectors) on demand.
 

Posted: 942 day(s) ago


Francisco Moreno L.
Could you tell me what CTI means ? >I found mentionned in peugeot and VW car and in DIESEL JAC MOTOR ENGINE 1.9L CTI .
best regards and thanks in advance
 

Posted: 934 day(s) ago


Shanmugam
Most of these abbreviations are different names for the same thing. All these essentially are common-rail diesel engines, but with minor differences. CRDI - is what Hyundai uses. DDIS - is what Maruti uses for its engines. TDI is what VW calls it. TCDI is what GM calls it. CRDE is what M&M calls it, TDCI is what Ford calls it. Quadrajet/CR4/ are all Tata nomenclature. VW earlier tried a slightly different diesel injection system called PD (pumpe duese) that came on the earlier Skoda Octavia, but these were quite noisy, and to meet EUIV norms, VW also reverted to common-rail technology. Variable geometry turbos (VGT) is used on the Punto 90, Vista 90, SX4, Ertiga etc. Fixed geometry or FGT is on the cars with lower bhp output.
 

Posted: 934 day(s) ago


Deepak Tiwari
Dear all I am using CR4 engine in my Tata Indigo eCS LX, Recently i faced the problem like poor pickup, black smoke, and knocking sound from engine, when i go to the authorised dealer they said there is problem in one of the injector and the replacement cost is almost 12000-15000 inr. Can anybody suggest me the alternative because my car runned almost 40000 km an it is not judicial to spend 12k-15k on a single injector. PLSSSSSSSSSSSSSS Help me
 

Posted: 932 day(s) ago


Mr.Akshaya
Dear first confirm me first what they have checked,and had confirmed you to check injecter,these symptoms occurs due to many problems in diesel engine,do at service point the stop control test or injecter balance test by diagnostic tool.insist them
 

Posted: 915 day(s) ago


Jan
ulol kayo
 

Posted: 905 day(s) ago


Tony
m crdi k baare m janna chahta hu plz hindi m aaf saaf btaiye ye kya hota h
 

Posted: 902 day(s) ago


Arnav
Please tell me which one is expensive CRDI or other Engine's
 

Posted: 900 day(s) ago


Yashu
Deepak Tiwari ji please add an additive with diesel that will definately help you...you can buy diesel additive
company name :- wurth
add just 50 ml in full tank
 

Posted: 882 day(s) ago


Yashu
Tony sir..saari ramayan suna di aapko mr jacob ne......itna sab likha hain.......bhai CRDI latest technology hain but TDI bhi bekaar nahi hain......CRDI costly padega in comparision to TDI......Baaki use par depend karta hain........Abhi jaise deepak tiwari ji ne bataya ki woh chalaye jaa rhe hain 15000 par injector choke tha fir bhi........bhai acha mechanic dekho....kabhi kabhi basic formulas bhi kaam aa jaate hain.....should start from basic for any type of problem in vehicles....
 

Posted: 882 day(s) ago


Chakravarthy
crdi is most efficient than tdi engines .in crdi it's pumping system is totally supported by the help of sensors and has only one injector turbo pipe which pumps the fuel according to the usage but in tdi engine's the fuel injection has various sensors and has many fuel pumping cylinder's but both fuel efficiency is same
 

Posted: 876 day(s) ago


Amit
want the correct answer coz except praveen who has it PARTIALLY correct,everyboby else is in the dark.visit us at www.iae-india.net
 

Posted: 869 day(s) ago


Hjm
tdi belongs to a big german manufacturer, whereas crdi belongs to a big south korean manufacturer. they are both turbo charged common rail diesel engines; and both work on the same principles. they are tuned differently, and produced by different companies and thus have different characteristics. i would say latest 1.6 tdi (it is also newer than the latest 1.6 crdi) is better at fuel efficiency and low rev. torque, whereas latest crdi has a lot of power and is good in upper revs. again, subjectively, both are good engines; but i would prefer tdi over crdi, because of the fact that the manufacturer of tdi have better record and more experience in diesel engines.

and i have a ph.d. in automotive engineering.
 

Posted: 809 day(s) ago


Michael
TDI Is Turbo Direct Injection its actually a VAG house brand and still exist even though they are all High Pressure Common Rail driven (up to 22,000 psi) since 2009 and not as high of a pressure on its earlier common rail PD's. Even though they call the newer TDI engine CR they have been using the common rail injection on the PD model. Just about every new diesel engine is running a HPFP ( High Pressure Fuel Pump) now due to its increased efficiency in the combustion process. This leads to a higher output engine at lower emissions but not necessarily greater fuel mileage.
 

Posted: 808 day(s) ago


Nishant
I think nobody is technical here, however they are discussing both the technologies, Mr. Jacob Ravi has described it very well. however if anyone from all the people on this forum is not satisfied with the answer provided by Mr. Jacob Ravi and really want to go deep into the technology then please Google it for specific technology and get the knowledge but please don't take it further anymore. Bottom line - CRDI is good and advance technology ruling out in the Automobile market nowadays.
Features of CRDI where TDI lags
1) Silent than TDI
2) swift Acceleration than TDI
3) More Smooth than TDI
4) Better Pick-up than TDI
5) Good for Smaller Engines
6) CRDI Doesn't heat up like TDI

If anyone has some issues on my above comments, please let it be, but don't comment further on this. why don't you Google on this topic and get this confirmed before commenting on my posts?
 

Posted: 780 day(s) ago


Lakshman
German's TDI engine uses better alloy(titanium and copper) to with stand heat and speed where as korean CRDI engine has poor pick up,more maintenance cost after 30000km's due to all aluminium engine and valves,coolant do not withstand much heat.Quality is poor in korean CRDI engine's
 

Posted: 707 day(s) ago


Gangster
Crdi. It makes the diesel engine runs like a gasoline.. buttom line

 

Posted: 683 day(s) ago


Nitin John
Audi's skoda's VWs, seat, Porsche , land rovers they all use TDI, and is far better than the Korean CRDI.
 

Posted: 617 day(s) ago


Gaurav
4-5 lach tk ki diesel car konsi leni chahiye
 

Posted: 540 day(s) ago


Pk
can anyone suggest me a good engine oil for indigo CS
 

Posted: 493 day(s) ago


V Madhusudhan
i am using skoda fabia 1422 cc heavy noise in engine comparatively with quadrajet ,crdi & d tech no doubt germany technology engines are powerful they are suppose to adopt measures taken by korean technicians how they have reduceced noise in their manufacturing diesel engines
 

Posted: 491 day(s) ago


Shaileshwar
Hi,
This is Shailesh. Can any expert tell me that what is the performance & actual milage of Fiat Punto Evo diesel engine.. Actually I am planning to buy Fiat Punto Evo..
 

Posted: 457 day(s) ago


Shaileshwar
WHich is the best car to buy.. Indigo ecs tdi or indigo ecs cr4 or fiat punto evo according to maintenance, performance & milage...
 

Posted: 457 day(s) ago


Diya
which is best car crdi engine or tdi engine .What about 8 v /16 v or DDIS . What is the the difference between these technology. some body explain to me.
 

Posted: 422 day(s) ago


Mann
sabi loog apne apne kaam pe lagjao, engine ko apna kaam karne do bhai....engine ke peeche kyun pade ho....
 

Posted: 357 day(s) ago


Sunny
what is the meaning of di ,crs,vcdi,hdi,xpi,ccr, CDTi, TiD, TTiD, i-CTDi and i-DTEC Mahindra: CRDe, DiCR, m2DiCR Tata: DICOR and CR4 Volvo: D and D5 engines Mitsubishi: DI-D Jeep: CRD Isuzu: iTEQ nd crr ,cdi
 

Posted: 357 day(s) ago


Chandrasekar
CRDI is the opposite of inline injection. In CRDI you have one pump and a common rail which holds the diesel at high pressure for all the injectors. Injector activation is done by ECU. Inline FIP uses a rotary pump which acts as a individual pump for each injector. Example TATA Indica V2, older Leyland bus, tractor, older mahindra jeep etc. in this the injection can direct injection like used in jeeps, truck, tractor or indirect like Indica V2. If a turbo charger is added it is called TDI. CRDI vehicles are always expensive since they are used with ECU and Turbo charger.
 

Posted: 317 day(s) ago


Rahul
Can you install a different brand (better, durable) fuel injection system in VW Vento diesel. I am told by the dealer that my car fuel injection system has gone bad after 54000 km. The reason given is bad fuel quality. Replacement Cost quoted 2.2 lacs.
If anyone has knowledge about the modification please guide.
 

Posted: 252 day(s) ago


N.D PRASAD
tdi is nothing but injection of some amount of fuel late into the engine cylinder(basically it is the technology in which injection of diesel is taking place in different phases) to increase the temp of the exhaust gas to obtain more power from turbocharger
 

Posted: 151 day(s) ago


Raman
sir kya bosh or delfi ke injector me se kon se injector bdiya performs dete h or intector cleaner use krna chahiye delfi injector me or delfi injector noise kyu krta h jayda
 

Posted: 86 day(s) ago


RAJU KUMAR
tdi is better an crdi
 

Posted: 66 day(s) ago


Vijay
crdi is the best one compared to tdi because it only produce less noise well check i20,verna compared to polo tdi crdi is the best one and i feel it
 

Posted: 42 day(s) ago


Vijay
i'm a mechanical enginer and i had analayse hundres of car engine crdi is the best non noisy disel engine and its effiency is too high compared to othes please check the eng sound before buying TDI OR DDIS OR CRDI crdi is the class leader...
 

Posted: 42 day(s) ago


LKS
wich is the best diesal engine tdi or cr4 or dicore of tata
 

Posted: 26 day(s) ago


Cyril
I suppose crdi and TDI is not that different.Almost all diesel engines now available works crdi technology.
Manufacturers use different code names ... TDI IS USED BY VW GROUP
 

Posted: 21 day(s) ago


Cyril
To mention their engines... But their engines also run using same crdi technology... Pls chech the cars tech details... Maruti usus ddis for their diesel,tata manza uses quadrajet
 

Posted: 21 day(s) ago


Cyril
For their diesel ... But both of the manufacturers diesel engine is fiat 1.3 multijet diesel... Then I ATS the difference
 

Posted: 21 day(s) ago


Cyril
TDI stands for turbo direct line injection ... Also file is pumped to the 4,3,6,8 cylinders using a common rail
 

Posted: 21 day(s) ago


Iqbal Singh
sir mere ko btao quadrajet shi hai ya tdi
 

Posted: 16 day(s) ago


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