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MotorFiable

TDV6 / SDV6 vs 1.5 D (TUD5): which engine is more reliable?

According to our risk index, the 1.5 D (TUD5) carries less risk than the TDV6 / SDV6: 19/100 (low risk) versus 46/100 (moderate risk). The TDV6 / SDV6 has 2 documented serious faults, the main one being «Crankshaft breakage and spinning main bearing shells»; the 1.5 D (TUD5) has no documented serious faults.

Risk index

TDV6 / SDV6

46

Moderate risk · 2 serious faults

Risk index

1.5 D (TUD5)

19

Low risk · 0 serious faults

Lower risk

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

13 sourcesHow 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 1.5 D (TUD5) reliable?

A small indirect-injection diesel, slow but simple, with a good reputation for durability once its early problems are behind it. Its documented weak point is the cylinder head gasket, with oil leaks that PSA corrected in stages between 1995 and 1998; other issues (high idle, pump leaks, glow plug connector) are occasional.[4][5][6]

See the 3 of the 1.5 D (TUD5) faults

Side-by-side comparison

Comparison of TDV6 / SDV6 and 1.5 D (TUD5)
TDV6 / SDV61.5 D (TUD5)
Technical data
TypeEngineEngine
FuelDieselDiesel
Displacement2,720 cm³—
TimingWet belt (belt-in-oil)Timing belt (dry)
Power188–302 hp50–58 hp
Production2004–2018[7]1988–2004[8][9][10]
Reliability
Risk index (what is it?)46Moderate risk19Low risk
Documented faults33
Of high or critical severity20
Worst severityCritical severityMedium severity
Main faults
  1. Critical severity: Crankshaft breakage and spinning main bearing shells
  2. Critical severity: Broken oil pump housing and timing belt jumping on the 2.7
  3. Medium severity: Turbo and pneumatic actuator failure on the 3.0 TDV6/SDV6
  1. Medium severity: Oil leaks from the cylinder head gasket and crankshaft seal
  2. Medium severity: Injection pump: high idle and leaks
  3. Low severity: Glow plug faults: corroded connector and glow plugs
Most expensive documented repairNo reliable dataNo reliable data
Which versions to buy
BuyRecommended versionsNoneNone
With cautionVersions to be cautious about
  • 2.7 TDV6 (276DT/DT17, 2004-2010)[3][11]
  • 3.0 TDV6/SDV6 (306DT, 2009-2018)[1][2]
  • 1.4 D 50 hp (TUD3Y, 1993-1994 on the 106)[4][6]
  • 1.5 D 54-58 hp (TUD5: VJZ, VJY and VJX, 1994-2003)[4][12][13]
AvoidVersions to avoidNoneNone

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

1.5 D (TUD5)

Other comparisons

With the TDV6 / SDV6

With the 1.5 D (TUD5)

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.

  1. Land Rover Discovery TDV6 engine failures making headlinesLandyOnline · Other source · published October 2015 · consulted 5 October 2026
  2. Land Rover & Jaguar SDV6/TDV6 Crankshaft RepairJLR Engines · Technical documentation · consulted 5 October 2026
  3. Land Rover 2.7 TDV6 Timing Belt Replacement GuideBudget Parts (roverparts.eu) · Technical documentation · consulted 5 October 2026
  4. Peugeot 106: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  5. Citroën Saxo: fiche fiabilitéCaradisiac · Motoring press · consulted 2 November 2026 · in French
  6. Quelle citadine d'occasion choisir ?L'argus · Motoring press · consulted 2 November 2026 · in French
  7. Ford AJD-V6/PSA DT17 engineWikipedia · Other source · consulted 5 October 2026
  8. PSA TUD engineWikipedia (en) · Other source · consulted 2 November 2026
  9. Peugeot 106Wikipedia (de) · Other source · consulted 2 November 2026 · in German
  10. Peugeot 106 1.5 D 58 ch: fiabilité du moteurFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  11. TdV6 Timing BeltLes Richmond Automotive (lrautomotive.com.au) · Technical documentation · consulted 5 October 2026
  12. Fiabilité Peugeot 106: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French
  13. Fiabilité Citroën Saxo: pannes et avis des propriétairesFiches-auto.fr · Owners' forum · consulted 2 November 2026 · in French