TDV6 / SDV6 vs 2.2/2.5 dCi: which engine is more reliable?

According to our risk index, the TDV6 / SDV6 carries less risk than the 2.2/2.5 dCi: 46/100 (moderate risk) versus 52/100 (high risk). The TDV6 / SDV6 has 2 documented serious faults, the main one being «Crankshaft breakage and spinning main bearing shells»; the 2.2/2.5 dCi has 3 documented serious faults, the main one being «Premature turbo and intercooler failure».

Risk index

TDV6 / SDV6

Moderate risk · 2 serious faults

Lower risk

Risk index

2.2/2.5 dCi

High risk · 3 serious faults

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 5 October 20269 sources How we work

Is the TDV6 / SDV6 reliable?

The Land Rover and Jaguar TDV6/SDV6 diesel V6 engines, shared with Peugeot and Citroën, have a serious documented fault: crankshaft and main bearing shells on the 3.0, and the belt-driven oil pump on the 2.7. Insist on a service history and weigh up the repair cost before buying.^[1][2][3]

See the 3 of the TDV6 / SDV6 faults

Is the 2.2/2.5 dCi reliable?

The 2.2 dCi (YD22DDT/YD22DDTi) and 2.5 dCi (YD25DDTi) are diesels of Nissan's own design, with a timing chain, fitted to the Almera, Primera, X-Trail, Navara and Pathfinder between 2000 and 2015. The turbo and its intercooler are the best-documented fault, above all on the X-Trail, along with injector failures; the timing chain, on the other hand, gives hardly any trouble according to the reliability reports consulted.^[4][5][6]

See the 5 of the 2.2/2.5 dCi faults

Side-by-side comparison

Comparison of TDV6 / SDV6 and 2.2/2.5 dCi
Item	TDV6 / SDV6	2.2/2.5 dCi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,720 cm³	—
Timing	Wet belt (belt-in-oil)	Chain
Power	188–302 hp	110–190 hp
Production	2004–2018^[7]	2000–2015^[4][8]
Reliability
Risk index (what is it?)	46Moderate risk	52High risk
Documented faults	3	5
Of high or critical severity	2	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: Crankshaft breakage and spinning main bearing shells Critical severity: Broken oil pump housing and timing belt jumping on the 2.7 Medium severity: Turbo and pneumatic actuator failure on the 3.0 TDV6/SDV6	High severity: Premature turbo and intercooler failure High severity: Injection pump or injector failure Critical severity: Timing chain wear
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	2.7 TDV6 (276DT/DT17, 2004-2010)^[3][9] 3.0 TDV6/SDV6 (306DT, 2009-2018)^[1][2]	2.2 Di 110-125 (YD22DDT, 2000-2003)^[5] 2.2 dCi 136-140 (YD22DDTi, 2003-2007)^[6] 2.5 dCi 142-174 (YD25DDTi, 2005-2010)^[4] 2.5 dCi 144-190 (YD25DDTi, 2010-2015)^[4]
AvoidVersions to avoid	None	None

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

TDV6 / SDV6

See the 14 models with the TDV6 / SDV6

2.2/2.5 dCi

Other comparisons

With the TDV6 / SDV6

With the 2.2/2.5 dCi

Compare other engines

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Sources

Every fact on this page links to its source. If you find an error, let us know.

Land Rover Discovery TDV6 engine failures making headlinesLandyOnline · Other source · published October 2015 · consulted 5 October 2026
Land Rover & Jaguar SDV6/TDV6 Crankshaft RepairJLR Engines · Technical documentation · consulted 5 October 2026
Land Rover 2.7 TDV6 Timing Belt Replacement GuideBudget Parts (roverparts.eu) · Technical documentation · consulted 5 October 2026
Nissan YD engineWikipedia · Other source · consulted 27 September 2026
Fiabilité Nissan Almera : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Fiabilité Nissan X-Trail : pannes et avisFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
Ford AJD-V6/PSA DT17 engineWikipedia · Other source · consulted 5 October 2026
Nissan Navara SE Doble Cabina 2.5 dCi 190 CV 4x4 — datos técnicoskm77 · Motoring press · consulted 27 September 2026 · in Spanish
TdV6 Timing BeltLes Richmond Automotive (lrautomotive.com.au) · Technical documentation · consulted 5 October 2026