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The Ford DLD engine is an automobile engine family - a group of compact inline 4 cylinder diesel engines developed jointly by Ford of Britain and the automotive diesel specialist PSA Group
(Peugeot/Citroën). The Ford of Britain/PSA joint venture for the production of the DLD/DV was announced in September, 1998. Half of the total engine count are produced at Ford of Britain's main plant at Dagenham, England and at Ford's Chennai plant in India, the other half at PSA's Trémery plant in France.

The inline 4 engines are sold under the Duratorq TDCi name by Ford, and as the HDi by Citroën and Peugeot. Mazda also uses the Ford made DLD engine in the Mazda2 and the Mazda 3, calling it the MZ-CD or CiTD.

Officially, there are two families of engines in the range:
-The 1.4 L DLD-414 is generally non-intercooled
-The 1.5 L derived from the 1.6 L
-The 1.6 L DLD-416 is always intercooled

Ford later added their unrelated 1.8 L DLD-418 engine to the DLD family, though it is properly part of the Ford Endura-D engine family.

DLD-414:
The Duratorq DLD-414 (or DV4) is a 1.4 L (1398 cm3/85 cui) inline 4 cylinder turbodiesel. Output is 67 HP @ 4500 rpm and 160 NM (117 lb-ft) @ 2000 rpm.

The DV4 is available in two versions:
One, an 8 valve design, uses a Borg-Warner KP35 turbocharger but no intercooler. This is the same turbocharger as the Renault K9K Diesel. It is Euro 3 compliant, but will receive a Diesel particulate filter from 2006 to make it Euro 4 compliant. In Ford, Mazda, and most PSA applications it uses a Siemens SID804 or SID802 common rail injection system. In some PSA applications a Bosch common rail system is used.

A second version uses a DOHC 16 valve design, with an intercooled variable geometry turbocharger. This engine uses Delphi Corp.'s DCR1400 common rail injection system. This derivation will no longer be built from 2006, as it will not be able to comply with the Euro 4 regulations.

Applications:
8 valve non-intercooled, 55 HP and 130 NM (96 lb-ft)
2005–2008 Citroën C1/Peugeot 107/Toyota Aygo 1.4 HDi
8 valve non-intercooled, 68 HP and 150 NM (111 lb-ft)
2003–2009 Citroën C2 1.4 HDi
8 valve non-intercooled, 68 HP and 160 NM (118 lb-ft)
2002–2009 Citroën C3 1.4 HDi
2002–2008 Ford Fiesta 1.4 TDCi
2002–2008 Ford Fusion (European) 1.4 TDCi
2002–2009 Peugeot 206 1.4 HDi
2005–2009 Peugeot 1007 1.4 HDi
2004 Citroen Xsara 1.4 HDI
2002–2007 Mazda 2/Demio 1.4D
2008–present Mazda 2/Demio 1.4D
2007–present Ford (India) 1.4 TDCi Fiesta, also marketed as the Ikon in South Africa.
2008–present Ford Bantam TDCi commercial vehicle in South Africa.
16 valve intercooled, 90 HP and 200 NM (147 lb-ft)
2001–2005 Citroën C3 1.4 HDi 16V
2002–2005 Suzuki Liana 1.4 DDiS

DLD-416:
The DLD-416 (or DV6) is a 1.6 L (1560 cm3/95 cui) UK Built version used by Ford, Volvo, PSA, Mini and Mazda.

The DV6 has a DOHC 16 valve design, with an intercooled variable geometry turbocharger (for example, Garrett GT1544V), and with Diesel particulate filter is Euro 5 compliant. In 2011 the 16V DOHC was reduced to 8V and only SOHC and called DV-6C/DV-6D.

Applications include:
2007–2008 Suzuki SX4 1.6 DDiS, 90 HP and 215 NM (159 lb-ft)
2007–2009 MINI Cooper D 1.6 110 HP and 240 NM (177 lb-ft)
2007–present Citroën C4 Picasso 1.6 HDi, 110 HP and 240 NM (177 lb-ft)
2010–present Citroën C3 Picasso 1.6 HDi, 110 HP and 240 NM (177 lb-ft)
2006–present Citroën Berlingo 1.6 HDi, 75–90 HP and 172–215 NM (127–159 lb-ft)
2008–2009 Citroën C2 1.6 HDi, 110 HP and 269 NM (198 lb-ft)
2005–present Citroën C3 1.6 HDi, 90 HP and 215 NM (159 lb-ft)
2009–present Citroën DS3 1.6 HDi, 90 HP and 230 NM (170 lb-ft)
2009–present Citroën DS3 1.6 HDi, 110 HP and 269 NM (198 lb-ft)
2011–present Citroën DS4 1.6 HDi, 110 HP and 269 NM (198 lb-ft)
2004–present Citroën C4 1.6 HDi, 90–109 HP and 215–240 NM (159–177 lb-ft)
2004–present Citroën C5 1.6 HDi, 109 HP and 240 NM (177 lb-ft)
2004–2009 Citroën Xsara Picasso 1.6 HDi, 109 HP and 240 NM (177 lb-ft)
2010–present Ford C-MAX/Grand C-MAX 1.6 TDCi, 115 HP and 270 NM (199 lb-ft)
2005–2010 Ford Fiesta 1.6 TDCi, 90 HP and 200 NM (148 lb-ft)
2010–present Ford Fiesta 1.6 TDCi, 95 HP and 212 NM (156 lb-ft)
2005–2012 Ford Fusion (European) 1.6 TDCi, 90 HP and 215 NM (159 lb-ft)
2004–present Ford Focus 1.6 TDCi 90, 90 HP and 215 NM (159 lb-ft)
2004–present Ford Focus 1.6 TDCi 110, 109 HP and 240 NM (177 lb-ft)
2004–2010 Ford Focus C-MAX 1.6 TDCi 90, 90 HP and 215 NM (159 lb-ft)
2003–2010 Ford Focus C-MAX 1.6 TDCi 110, 109 HP and 240 NM (177 lb-ft)
2008–present Mazda2 MZ-CD 1.6, 90 HP and 212 NM (156 lb-ft)
2003–present Mazda3 MZ-CD 1.6, 109 HP and 240 NM (177 lb-ft)
2003–2006 Peugeot 206 1.6 HDi, 109 HP and 240 NM (177 lb-ft)
2006–2012 Peugeot 207 1.6 HDi, 90–109 HP and 215–240 NM (159–177 lb-ft)
2005–2008 Peugeot 307 1.6 HDi, 90–109 HP and 215–240 NM (159–177 lb-ft)
2008–present Peugeot 308 1.6 HDi
2003–2010 Peugeot 407 1.6 HDi, 109 HP and 240 NM (177 lb-ft)
2010–present Peugeot 508 1.6 HDi, 112 HP and 240 NM (177 lb-ft)
2007–2012 Volvo C30 D2 and DRIVe, 115 HP and 270 NM (199 lb-ft)
2004–2012 Volvo S40 1.6D, 109 HP and 240 NM (177 lb-ft)
2004–2012 Volvo V50 1.6D, 109 HP and 240 NM (177 lb-ft)
2010–present Volvo S60/V60 1.6D, 115 HP and 240 NM (177 lb-ft)
2007–present Volvo V70 1.6D, 115 HP and 240 NM (177 lb-ft)
2009–present Volvo S80 1.6D DRIVe, 109 HP and 240 NM (177 lb-ft)

DLD-418:
The Duratorq DLD-418 is a 1.8 L (1753 cm3) intercooled common rail diesel engine. It is only a DLD by name, since it is completely unrelated to the 1.4/1.6 units, and is derived from Ford's own 1.8 8v Endura-D engine that saw service through the 1980s and 1990s. However, Ford considers it part of the DLD family, as evidenced by the official "DLD" name.

The Endura-D was heavily revised and updated with a variable-vane turbocharger and a Delphi high pressure common rail injection system and relaunched in 2001 as the DuraTorq TDCi, with the original engine being rebadged 'DuraTorq TDDi'.

The output of the original 2001 unit is 113 HP @ 3800 rpm and 250 NM (184 lb-ft) @t 1850 rpm. In August 2002, a version appeared in the Ford Focus with reduced power, producing 98 HP @ 3850 rpm and 240 NM (177 lb-ft) @ 1750 rpm. Early 2005 saw the more powerful unit's torque boosted to 280 NM (207 lb-ft) @ 1900 rpm, with power remaining unchanged at 113 HP.

The latest versions of the DLD-418 were released with the 2007 Ford Mondeo. One has an output of 98 HP @ 3850 rpm and 280 NM (207 lb-ft) @ 1800 rpm. The more powerful variant has an output of 123 HP @ 3700 rpm and 320 NM (236 lb-ft) @ 1800 rpm.

Applications:
2001–2004 Ford Focus 1.8 TDCi 115 HP and 250 NM (184 lb-ft)
2002–2004 Ford Focus 1.8 TDCi 100 HP and 220 NM (177 lb-ft)
2005–2011 Ford Focus 1.8 TDCi 115 HP and 280 NM (207 lb-ft)
2005–2010 Ford Focus C-MAX 1.8 TDCi 115 HP and 280 NM (207 lb-ft)
2006–2012 Ford Galaxy 1.8 TDCi 100 HP and 280 NM (207 lb-ft)
2007–2012 Ford Mondeo 1.8 TDCi 100 HP nd 280 NM (207 lb-ft)
2006–2012 Ford Galaxy 1.8 TDCi 125 HP and 320 NM (236 lb-ft)
2006–2012 Ford S-MAX 1.8 TDCi 125 HP and 320 NM (236 lb-ft)
2007–2012 Ford Mondeo 1.8 TDCi 125 HP and 320 NM (236 lb-ft)

Some people might feel offended by this list, but believe me, French car companies are manufacturing the worst electronics in the world + the 1.8 TDCi is one of the worstly managed engines ever! It suffers from turbo and fuel injection problems which aren't cheap to repair... If you are owning one and the fuel consumption is somewhere around 10-16 L/100 km, get rid of it as fast as you can! This means one (or more) of your injectors are gone, and they are costing 500 euro/piece to replace! (You got 4 in total, but if you're unlucky and had to replace 3 of them, that's a lot of money). Cheap, aftermarket ones won't give the desired results... Here is what I'm talking about: https://www.youtube.com/watch?v=RiPwco69mVQ

In case of the 1.6 HDi the problems are similar, but here if one of the fuel injectors is going wrong, the problem won't be recognized in time, because the engine is equipped with a "district leveling function" system which will keep the ride smooth, even under inadequate conditions... If this problem will be detected too late, then the EGR valves will be damaged also, because of the badly sprayed diesel fuel's burning which will clog the particulate filter and the DPF. When the EGR valve is damaged, it's allowing the soot full exhaust gases to travel backwards in the engine, even if this action shouldn't take place. (This will cost 960 euro at a car service, and the worst part is that, I took for example a 5 year old Peugeot 308 1.6 HDi, which was under 100000 km). After the mechanics solved the problems and re-programed the engine, you might look for a new DPF (http://allaboutdieselz.blogspot.ro/2015/08/diesel-particulate-filter-dpf.html), because the old one will be full of soot, just like in this pic:

UPDATE! FROM NOW ON YOU'RE ABLE TO READ ABOUT THE PROBLEMS OF EACH ENGINE FROM THIS LIST: https://allaboutdieselz.blogspot.com/2018/09/hdi-engines-and-their-problems.html