TDV6 / SDV6 vs 2.2 dCi and 3.0 dCi V6: which engine is more reliable?

The TDV6 / SDV6 and the 2.2 dCi and 3.0 dCi V6 tie on our risk index: 46/100 (moderate risk). The TDV6 / SDV6 has 2 documented serious faults, the main one being «Crankshaft breakage and spinning main bearing shells»; the 2.2 dCi and 3.0 dCi V6 has 2 documented serious faults, the main one being «3.0 dCi V6 overheating and expansion tank failures».

Risk index

TDV6 / SDV6

Moderate risk · 2 serious faults

Risk index

2.2 dCi and 3.0 dCi V6

Moderate risk · 2 serious faults

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

Reviewed on 30 October 202611 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 dCi and 3.0 dCi V6 reliable?

Renault's big 2000s diesels, the 2.2 dCi (G9T) and the 3.0 V6 dCi (P9X), have a poor reputation among owners: big-end bearing failures are cited on the 2.2 and overheating on the V6. The sources are mainly forums and the press that reports them, with no official statistics.^[4][5][6]

See the 3 of the 2.2 dCi and 3.0 dCi V6 faults

Side-by-side comparison

Comparison of TDV6 / SDV6 and 2.2 dCi and 3.0 dCi V6
Item	TDV6 / SDV6	2.2 dCi and 3.0 dCi V6
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,720 cm³	2,188 cm³
Timing	Wet belt (belt-in-oil)	Timing belt (dry)
Power	188–302 hp	115–180 hp
Production	2004–2018^[7]	2001–2009^[8][9]
Reliability
Risk index (what is it?)	46Moderate risk	46Moderate risk
Documented faults	3	3
Of high or critical severity	2	2
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	Critical severity: 3.0 dCi V6 overheating and expansion tank failures Critical severity: Big-end bearing failure in the 2.2 dCi (G9T) Medium severity: Blocked EGR valve and turbo and injector faults on the 2.2 dCi (G9T)
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][10] 3.0 TDV6/SDV6 (306DT, 2009-2018)^[1][2]	2.2 dCi 115-150 (G9T)^[5][6] 3.0 dCi V6 180 (P9X)^[4][11]
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 15 models with the TDV6 / SDV6

2.2 dCi and 3.0 dCi V6

Other comparisons

With the TDV6 / SDV6

With the 2.2 dCi and 3.0 dCi V6

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
Renault Espace et Vel Satis : le 3.0 V6 dCi surchauffeL'argus · Motoring press · published 22 June 2010 · consulted 5 October 2026 · in French
Laguna II : remplacement préventif coussinet de bielle 2.2 dCiPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French
Avantime : casse moteur 2.2 dCiPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French
Ford AJD-V6/PSA DT17 engineWikipedia · Other source · consulted 5 October 2026
Renault G-Type engineWikipedia (en) · Other source · consulted 5 October 2026
Renault Vel SatisWikipedia (fr) · Other source · consulted 5 October 2026 · in French
TdV6 Timing BeltLes Richmond Automotive (lrautomotive.com.au) · Technical documentation · consulted 5 October 2026
Vel Satis I : ma Vel Satis 3.0 dCi Initiale a des problèmesPlanèteRenault (foro) · Owners' forum · consulted 5 October 2026 · in French